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Publications in International Journals (80); Total citations: 1389; h-index: 22; i10-index: 51 

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C. V. V. M. Gopi, R. Vinodh, S. Sambasivam, I. M. Obaidat, S. Singh, H.J. Kim, Co₉S₈-Ni₃S₂/CuMn₂O₄-NiMn₂O₄ and MnFe₂O₄-ZnFe₂O₄/graphene as binder-free cathode and anode materials for high energy density supercapacitors. Chem. Eng. J., 2020, 381, 122640 (I.F.: 8.355). DOI: 10.1016/j.cej.2019.122640

C. V. V. M. Gopi,* R. Vinodh, S. Sambasivam, I.M. Obaidat, H.J. Kim, Recent progress of advanced energy storage materials for flexible and wearable supercapacitor: From design and development to applications, J. Energy Storage, 2020, 27, 101035 (I.F.: 3.517). DOI: 10.1016/j.est.2019.101035

H. W. Nam, C. V. V. M. Gopi,* S. Sambasivam, R. Vinodh, K.V.G. Raghavendra, H.J. Kim, I.M. Obaidat, S. Kim, Binder-free honeycomb-like FeMoO4 nanosheet arrays with dual properties of both battery-type and pseudocapacitive-type performances for supercapacitor applications, J. Energy Storage, 2020, 27, 101055 (I.F.: 3.517). DOI: 10.1016/j.est.2019.101055

C. V. V. M. Gopi,* R. Vinodh, S. Sambasivam, I. M. Obaidat, R. M. N. Kalla, H. J. Kim, One-pot synthesis of copper oxide-cobalt oxide coreeshell nanocactus-like heterostructures as binder-free electrode materials for high-rate hybrid supercapacitors.  Mater. Today Energy, 2019, 14, 100358 (CiteScore: 4.62). DOI: 10.1016/j.mtener.2019.100358

C. S. Song, C. V. V. M. Gopi,* R. Vinodh, S. Sambasivam, R. M. N. Kalla, I. M. Obaidat, H.J. Kim, Morphology-dependent binder-free CuNiO₂ electrode material with excellent electrochemical performances for supercapacitors, J. Energy Storage, 2019, 26, 101037 (I.F.: 3.517). DOI: 10.1016/j.est.2019.101037

C. H. Mun, C. V. V. M. Gopi,* R. Vinodh, S. Sambasivam, I. M. Obaidat, H.J. Kim, Microflower-like nickel sulfide-lead sulfide hierarchical composites as binder-free electrodes for high-performance supercapacitors. J. Energy Storage, 2019, 26, 100925 (I.F.: 3.517). DOI: 10.1016/j.est.2019.100925

H. H. Joo, C. V. V. M. Gopi,* R. Vinodh, H. J. Kim, S. Sambasivam, I. M. Obaidat, Facile synthesis of flexible and binder-free dandelion flower-like CuNiO₂ nanostructures as advanced electrode material for high-performance supercapacitors. J. Energy Storage, 2019, 26, 100914 (I.F.: 3.517). DOI: 10.1016/j.est.2019.100914

T. Y. Park, C. V. V. M. Gopi,* R. Vinodh, H. J. Kim, Facile synthesis of highly efficient V₂O₅@NiCo₂O₄ as battery‑type electrode material for high‑performance electrochemical supercapacitors. J. Mater. Sci.: Materials in Electronics, 2019, 30, 13519–13524 (I.F.: 2.195). DOI: 10.1007/s10854-019-01719-w

C. V. V. M. Gopi,* P. J. S. Rana, R. Vinodh, R. Padma, H. J. Kim,* Selective integration of hierarchical nanostructured energy materials: An effective approach to boost energy storage performance of flexible hybrid supercapacitor, J. Mater. Chem. A, 2019, 7, 6374-6386 (I.F.: 10.733). DOI: 10.1039/C8TA12508B

H. D. Chul, R. Vinodh*, C. V. V. M. Gopi, C. Deviprasath, H. J. Kim*, M. Yi, Effect of Cobalt and Zinc ratio on the Preparation of Zeolitic Imidazole Framework (ZIF): Synthesis, Characterization and Supercapacitor Application. Dalton Trans., 2019, 48, 14808-14819. (I.F.: 4.052).  DOI: 10.1039/C9DT03306H

P. Himasree, I. K. Durga, T. N. V. Krishna, S. S. Rao, C. V. V. M. Gopi, S. Revathi, K. Prabakar, H.J. Kim,* One-step hydrothermal synthesis of CuS@MnS on Ni foam for high performance supercapacitor electrode material, Electrochim. Acta, 2019, 305, 467-473 (I.F.: 5.383). DOI: 10.1016/j.electacta.2019.03.041

R. Vinodh, P. J. S. Rana, C. V. V. M. Gopi, Z. Yang, R. Atchudan, K. Venkatachalam, H. J. Kim,* Polyaniline–13X zeolite composite-supported platinum electrocatalysts for direct methanol fuel cell applications, Polymer International, 2019, 68, 929-935 (I.F.: 2.433). DOI: 10.1002/pi.5783.

H. C. Jung, R. Vinodh, C. V. V. M. Gopi, M. Yi, H. J. Kim, Novel composite electrode material derived from hypercross-linked polymer of pyrene and polyaniline for symmetric supercapacitor, Mater. Lett., 2019, 257, 126732 (I.F.: 3.019). DOI: 10.1016/j.matlet.2019.126732

S. Sambasivam, P. S. Maram, C. V. V. M. Gopi, I. M. Obaidat*, Effect of erbium on the structural, morphological, and optical properties of SnO₂ thin films deposited by spray pyrolysis, Optik, 2019, 202, 163596 (I.F.: 1.914). DOI: 10.1016/j.ijleo.2019.163596    

C. V. V. M. Gopi, A. E. Reddy, H. J. Kim*, Wearable superhigh energy density supercapacitors using hierarchical ternary metal selenides composite of CoNiSe₂ microspheres decorated with CoFe₂Se₄ nanorods. J. Mater. Chem. A, 2018, 6, 7439-7448 (I.F.: 10.733). DOI: 10.1039/C8TA01141A

C. V. V. M. Gopi, S. Singh, A. E. Reddy, H. J. Kim*, CNT@rGO@MoCuSe Composite as an Efficient Counter Electrode for Quantum Dot-Sensitized Solar Cells. ACS Appl. Mater. Inter., 2018, 10, 10036–10042 (I.F.: 8.456). DOI: 10.1021/acsami.7b18526

C. V. V. M. Gopi, A. E. Reddy, J. S. Bak, I. H. Cho, H. J. Kim*, One-pot hydrothermal synthesis of tungsten diselenide/reduced graphene oxide composite as advanced electrode materials for supercapacitors. Mater. Lett., 2018, 223, 57-60 (I.F.: 3.019). DOI: 10.1016/j.matlet.2018.04.023

S.Y. Kim,† C. V. V. M. Gopi,† A. E. Reddy, H. J. Kim*, Facile synthesis of a NiO/NiS hybrid and its use as an efficient electrode material for supercapacitor applications. New J. Chem., 2018, 42, 5309-5313 (I.F.: 3.069). DOI: 10.1039/C7NJ05145J

C. Nagaraju,  C. V. V. M. Gopi,*  J. W. Ahn  and  H. J. Kim*, Hydrothermal synthesis of MoS₂ and WS₂ nanoparticles for high-performance supercapacitor applications. New J. Chem., 2018, 42, 12357-12360 (I.F.: 3.069). DOI: 10.1039/C8NJ02822B

H. J. Kim, J. H. Bae, H. Seo, M. Shiratani, C. V. V. M. Gopi*, ZnS/SiO₂ Passivation Layer for High-Performance of TiO₂/CuInS₂ Quantum Dot Sensitized Solar Cells. Energies, 2018, 11, 1931 (I.F.: 2.707). DOI: 10.3390/en11081931

T. Park, C. V. V. M. Gopi*, J. Ahn and H. J. Kim*, Facile preparation of nanoflake MnNi₂O₄-PbS nanoparticle composite on Ni foam as advanced electrode materials for supercapacitors. New J. Chem., 2018, 42, 14157-14162 (I.F.: 3.069). DOI:
10.1039/C8NJ02709A

H. M. Lee, C. V. V. M Gopi,* P. J. S. Rana, R. Vinodh, S. H. Kim, R. Padma, H. J. Kim, Hierarchical nanostructured MnCo₂O₄-NiCo₂O₄ composite as an innovative electrode for supercapacitor applications. New J. Chem., 2018, DOI: 10.1039/C8NJ03764G (I.F.: 3.069).  DOI:  10.1039/C8NJ03764G

A. E. Reddy,  T. Anitha,  C. V. V. M. Gopi,  S. S. Rao  and  H. J. Kim*, NiMoO₄@NiWO₄ honeycombs as a high performance electrode material for    supercapacitor applications. Dalton Trans., 2018, 47, 9057-9063 (I.F.: 4.052). DOI:
10.1039/C8DT01245H

Himanshu, S. S. Rao, D. Punnoose, P. Sathishkumar, C. V. V. M. Gopi, N. Bandari, I. K. Durga, T. N. V. Krishna and H. J. Kim*, Development of Novel and Ultra-High-Performance Supercapacitor Based on a Four Layered Unique Structure. Electronics, 2018, 7, 121 (I.F.: 2.110). DOI: 10.3390/electronics7070121

A. Subramanian, D. Punnoose, V. Raman, C. V. V. M. Gopi, S. S. Rao, M. A. Khan, H. J. Kim*, Layer by layer approach to enhance capacitance using metal sulfides for supercapacitor applications. Mater. Lett., 2018, 213, 64-67 (I.F.: 3.019). DOI: 10.1016/j.matlet.2018.07.118

I. K. Durga, S. S. Rao, A. E. Reddy, C. V.V.M. Gopi, H. J. Kim*, Achieving copper sulfide leaf like nanostructure electrode for high performance supercapacitor and quantum-dot sensitized solar cells. Appl. Surf. Sci., 2018, 435, 666-675 (I.F.: 5.155). DOI: 10.1016/j.apsusc.2017.11.171

M. A. Khan, K. Zeb, P. Sathishkumar, Himanshu, S. S. Rao, C. V. V. M. Gopi, H. J. Kim*, A Novel Off-Grid Optimal Hybrid Energy System for Rural Electrification of Tanzania Using a Closed Loop Cooled Solar System. Energies, 2018, 11, 905 (I.F.: 2.707). DOI: 10.3390/en11040905

A. E. Reddy, T. Anitha, C. V. V. M. Gopi, I. K. Durga, H. J. Kim*, Facile synthesis of hierarchical ZnMn₂O₄@ZnFe₂O₄ microspheres on nickel foam for high-performance supercapacitor applications. New J. Chem., 2018, 42, 2964-2969 (I.F.: 3.069). DOI:
10.1039/C7NJ04269H

C. V. V. M. Gopi, S. Ravi, S. S. Rao, A. E. Reddy, H. J. Kim*, Carbon nanotube/metal-sulfide composite flexible electrodes for high-performance quantum dot-sensitized solar cells and supercapacitors. Sci. Rep., 2017, 7, 46519 (I.F.: 4.011). DOI: 10.1038/srep46519

C. V. V. M. Gopi, S. Somasekhar, A. E. Reddy, S.K. Kim, H. J. Kim*, One-step facile hydrothermal synthesis of Fe₂O₃@LiCoO₂ composite as excellent supercapacitor. Appl. Surf. Sci., 2017, 435, 462-467 (I.F.: 5.155). DOI: 10.1016/j.apsusc.2017.11.164

H. J. Kim, C. W. Kim, S. Y. Kim, A. E. Reddy, C. V. V. M. Gopi*, Facile synthesis of unique diamond-like structured CdMn₂O₄@CdMn₂O₄ composite material for high performance supercapacitors. Mater. Lett., 2017, 210, 143-147 (I.F.: 3.019). DOI: 10.1016/j.matlet.2017.09.014

H. J. Kim, S. Y. Kim, L. J. Lim, A. E. Reddy, C. V. V. M. Gopi*, Facile one-step synthesis of a composite CuO/Co₃O₄ electrode material on Ni foam for flexible supercapacitor applications. New J. Chem., 2017, 41, 5493-5497 (I.F.: 3.069). DOI:
10.1039/C7NJ01109A

H. J. Kim, B. Ko, C. V. V. M. Gopi*, M. V. Haritha, Y. S. Lee, Facile synthesis of morphology dependent CuS nanoparticle thin films as a highly efficient counter electrode for quantum dot sensitized solar cells. J. Electroanal. Chem., 2017, 791, 95-102 (I.F.: 3.218). DOI: 10.1016/j.jelechem.2017.03.019

T. Zheng, H. J. Kim, C. V. V. M. Gopi*, M. V. Haritha, M. K. Son, H. Seo, Efficient electron transfer and reduced recombination with Nd:YAG laser scribing for high-efficiency quantum dot-sensitized solar cells. Opt. Laser Technol., 2017, 94, 290-295, (I.F.: 3.319). DOI: 10.1016/j.optlastec.2017.04.006

H. J. Kim, G. C. Xu, C. V. V. M. Gopi*, H. Seo, M. V. Haritha, M. Shiratani, Enhanced light harvesting and charge recombination control with TiO₂/PbCdS/CdS based quantum dot-sensitized solar cells. J. Electroanal. Chem., 2017, 788, 131-136 (I.F.: 3.218). DOI: 10.1016/j.jelechem.2017.02.005

H. Seo, C. V. V. M. Gopi, H. J. Kim, N. Itagaki, K. Kog, M. Shiratani, Performance enhancement of quantum dot-sensitized solar cells based on polymer nano-composite catalyst. Electrochim. Acta, 2017, 249, 337-342 (I.F.: 5.383). DOI: 10.1016/j.electacta.2017.08.030

S. Singh, N. M Shinde, Q. X. Xia, C. V. V. M. Gopi, J. M. Yun, R. S. Mane, K. H. Kim, Tailoring the morphology followed electrochemical performance of NiMn-LDH nanosheet-arrays through controlled Co-doping for high energy and power asymmetric supercapacitors. Dalton Trans., 2017, 46, 12876-12883 (I.F.: 4.052). DOI: 10.1039/C7DT01863K

S. S. Rao, I. K. Durga, N. Kundakarla, D. Punnoose, C. V. V. M. Gopi, A. E. Reddy, M. Jagadeesh, H. J. Kim*, A hydrothermal reaction combined with a post anion-exchange reaction of hierarchically nanostructured NiCo₂S₄ for high-performance QDSSCs and supercapacitors. New J. Chem., 2017, 41, 10037-10047 (I.F.: 3.069). DOI: 10.1039/C7NJ02379K

C. D. Sunesh, C. V. V. M. Gopi, M. P. A. Muthalif, H. J. Kim, Y. Choe*, Improving the efficiency of quantum-dot-sensitized solar cells by optimizing the growth time of the CuS counter electrode. Appl. Surf. Sci., 2017, 416, 446-453 (I.F.: 5.155). DOI: 10.1016/j.apsusc.2017.04.200

Y. S. Lee, C. V. V. M Gopi, A. E. Reddy, C. Nagaraju, H. J. Kim*, High-performance of TiO₂/CdS quantum dot sensitized solar cells with a Cu-ZnS passivation layer. New J. Chem., 2017, 41, 1914-1917 (I.F.: 3.069). DOI:  10.1039/C6NJ03898K

A. E. Reddy, T. Anitha, C. V. V. M. Gopi, S. S. Rao, C. V. T. Varma, D. Punnoose, H. J.  Kim*, Fabrication of a snail shell-like structured MnO₂@CoNiO₂ composite electrode for high performance supercapacitors. RSC Adv., 2017, 7, 12301–12308 (I.F.: 3.049). DOI:
10.1039/C7RA01126A

Y. Anil Kumar, S. S. Rao, D. Punnoose, C. V. T. Varma, C. V. V. M. Gopi, K.  Prabakar, H. J. Kim*, Influence of solvents in the preparation of cobalt sulfide for supercapacitors. Royal Soc. Open Sci., 2017, 7, 170427 (I.F.: 2.515). DOI: 10.1098/rsos.170427

A. E. Reddy, T. Anitha, C. V. V. M. Gopi, S. S. Rao, B. Naresh, H. J. Kim*, Construction of novel nanocomposite ZnO@CoFe₂O₄ microspheres grown on nickel foam for high performance electrochemical supercapacitors. Anal. Methods, 2017, 10, 223-229 (I.F.: 2.378). DOI: 10.1039/C7AY02176C

A. E. Reddy, S. S. Rao, C. V. V. M. Gopi, T. Anitha, C. V. T. Varma, D. Punnoose, H. J. Kim, Morphology controllable time-dependent CoS nanoparticle thin films as efficient counter electrode for quantum dot-sensitized solar cells. Chem. Phys. Lett., 2017, 687, 238-243 (I.F.: 1.901). DOI: 10.1016/j.cplett.2017.09.001

C. V. V. M Gopi, M. V. Haritha, Y. S. Lee, H. J. Kim*, ZnO nanorods decorated with metal sulfides as stable and efficient counter electrode materials for high-efficiency quantum dot-sensitized solar cells. J. Mater. Chem. A, 2016, 4, 8161-8171 (I.F.: 10.733). DOI:
10.1039/C6TA02415G

C. V. V. M Gopi, M. V. Haritha, H. Seo, S. Singh, S. K. Kim, M. Shiratani, H. J. Kim*, Improving the performance of quantum dot sensitized solar cells through CdNiS quantum dots with reduced recombination and enhanced electron life time. Dalton Trans., 2016, 45, 8447-8457 (I.F.: 4.052). DOI: 10.1039/C6DT00283H

C. V. V. M Gopi, M. V. Haritha, S. K. Kim, H. J. Kim*, Facile fabrication of highly efficient carbon nanotube thin film replacing CuS counter electrode with enhanced photovoltaic performance in quantum dot-sensitized solar cells. J. Power Sources, 2016, 311, 111-120 (I.F.: 7.467). DOI: 10.1016/j.jpowsour.2016.02.039

C. V. V. M Gopi, M. V. Haritha, K. Prabakar, H. J. Kim*, Low-temperature easy-processed carbon nanotube contact for high-performance metal- and hole-transporting layer-free perovskite solar cells. J. Photochem. Photobiol. A: Chemistry, 2016, 332, 265-272 (I.F.: 3.261). DOI: 10.1016/j.jphotochem.2016.09.003

C. V. V. M Gopi,† M. V. Haritha,† K. Prabakar, S. K. Kim, H. J. Kim*, Flower-like ZnO@MnCo₂O₄ nanosheet structures on nickel foam as novel electrode materials for high-performance supercapacitors. RSC Adv., 2016, 6, 102961–102967 (I.F.: 3.049). DOI:
10.1039/C6RA22196C

M. V. Haritha,† C. V. V. M Gopi,† Y. S. Lee, H. J. Kim*, Phase transformations of novel Cu_xS nanostructures as highly efficient counter electrodes for stable and reproducible quantum dot-sensitized solar cells. RSC Adv., 2016, 6, 101185–101197 (I.F.: 3.049). DOI: 10.1039/C6RA23763K

Y. S. Lee, C. V. V. M Gopi, M. V. Haritha, H. J. Kim*, Recombination control in high-performance quantum dot-sensitized solar cells with novel TiO₂/ZnS/CdS/ZnS heterostructure. Dalton Trans., 2016, 45, 12914–12923 (I.F.: 4.052). DOI: 10.1039/C6DT02531E

S. Ravi, C. V. V. M Gopi, H. J. Kim*, Enhanced electrochemical capacitance of Polyimidazole coated covellite CuS dispersed CNT composite materials for application in supercapacitors. Dalton Trans., 2016, 45, 12362–12371 (I.F.: 4.052). DOI: 10.1039/C6DT01664B

S. Ravi, C. V. V. M Gopi, S. S. Rao, S. K. Kim, H. J. Kim*, Hydroxyl solvents prompted interwoven morphological deposition of iron sulfide nanoparticles as an effective counter electrode for quantum dot sensitized Solar cell. Electrochim. Acta, 2016, 204, 255-262 (I.F.: 5.383). DOI: 10.1016/j.electacta.2016.04.079

M. V. Haritha, C. V. V. M Gopi, Y. S. Lee, H. J. Kim*, Controlled growth of nanoplatelet-structured copper sulfide thin film as a highly efficient counter electrode for quantum dot-sensitized solar cells. RSC Adv., 2016, 6, 45809–45818 (I.F.: 3.049). DOI:
10.1039/C6RA08375G

S. K. Kim, C. V. V. M Gopi, S. S. Rao, D. Punnoose, H. J. Kim*, Highly Efficient Yttrium-doped ZnO Nanorods for Quantum Dot-sensitized Solar Cells. Appl. Surf. Sci., 2016, 365, 136-142 (I.F.: 5.155). DOI: 10.1016/j.apsusc.2016.01.043

Y. S. Lee, C. V. V. M Gopi, M. V. Haritha, S. S. Rao, H. J. Kim*, Electrochemical growth of NiS nanoparticle thin film as counter electrode for quantum dot-sensitized solar cells. J. Photochem. Photobiol. A: Chemistry, 2016, 332, 200-207 (I.F.: 3.261). DOI: 10.1016/j.jphotochem.2016.08.031

H. J. Kim, S. M. Suh, S. S. Rao, D. Punnoose , C. V. Tulasivarma, C. V. V. M Gopi, N. Kundakarla, S. Ravi, I. K. Durga*, Investigation on novel CuS/NiS composite counter electrode for hindering charge recombination in quantum dot sensitized solar cells. J. Electroanal. Chem., 2016, 777, 123-132 (I.F.: 3.218). DOI: 10.1016/j.jelechem.2016.07.037

S. S. Rao, I. K. Durga,T. S. Kang, S. K. Kim, D. Punnoose, C. V. V. M Gopi,  A. E. Reddy, T. N. V. Krishna, H. J. Kim*, Enhancing the photovoltaic performance and stability of QDSSCs using surface reinforced Pt nanostructures with controllable morphology and superior electrocatalysis via cost-effective chemical bath deposition. Dalton Trans., 2016, 45, 3450–3463 (I.F.: 4.052). DOI: 10.1039/C5DT04887G

V. Raman, D. Punnoose, P. Baraneedharan, S. S. Rao, C. V. V. M. Gopi, S. Venkatesh, S. Brahadeeswarand, H. J. Kim*, Study on the efficient PV/TE characteristics of the self-assembled thin films based on bismuth telluride/cadmium telluride. RSC Adv., 2016, 7, 6735-6742 (I.F.: 3.049). DOI: 10.1039/C6RA26638J

C. V. V. M Gopi, M. V. Haritha, S. K. Kim, H. J. Kim*, Improved photovoltaic performance and stability of quantum dot sensitized solar cells using Mn-ZnSe shell structure with enhanced light absorption and recombination control. Nanoscale, 2015, 7, 12552–12563 (I.F.: 6.970). DOI: 10.1039/c5nr03291a

C. V. V. M Gopi, M. V. Haritha, S. Ravi, C. V. Tulasivarma, S. K. Kim, H. J. Kim*, Solution Processed Low-Cost and Highly Electrocatalytic Composite NiS/PbS Nanostructures as a Novel Counter Electrode Material for High-Performance Quantum Dot-Sensitized Solar Cells with Improved Stability. J. Mater. Chem. C, 2015, 3, 12514-12528 (I.F.: 6.641). DOI: 10.1039/C5TC03138A

C. V. V. M Gopi, M. V. Haritha, S. K. Kim, H. J. Kim*, A strategy to improve the energy conversion efficiency and stability of quantum dot-sensitized solar cells using manganese-doped cadmium sulfide quantum dots. Dalton Trans., 2015, 44, 630-638 (I.F.: 4.052). DOI: 10.1039/C4DT03063J

C. V. V. M Gopi, J. H. Bae, M. V. Haritha, S. K. Kim, Y. S. Lee, G. Sarat, H. J. Kim*, One-step synthesis of solution processed time- dependent highly efficient and stable PbS counter electrodes for quantum dot-sensitized solar cells. RSC Adv., 2015, 5, 107522–107532 (I.F.: 3.049). DOI: 10.1039/C5RA22715A

C. V. V. M Gopi, S. S. Rao, S. K. Kim, D. Punnoose, H. J. Kim*, Highly effective nickel sulfide counter electrode catalyst prepared by optimal hydrothermal treatment for quantum dot-sensitized solar cells. J. Power Sources, 2015, 275, 547-556 (I.F.: 7.467). DOI: 10.1016/j.jpowsour.2014.11.038

C. V. V. M Gopi, M. V. Haritha, S. K. Kim, S. S. Rao, D. Punnoose, H. J. Kim*, Highly efficient and stable quantum dot-sensitized solar cells based on a Mn-doped CuS counter electrode. RSC Adv., 2015, 5, 2963–2967 (I.F.: 3.049). DOI: 10.1039/C4RA12968G

C. V. Thulasivarma, C. V. V. M Gopi, S. S. Rao, D. Punnoose, S. K. Kim, H. J. Kim*, Time Varied Morphology Controllable Fabrication of NiS Nanosheets Structured Thin Film and its Application as a Counter Electrode for QDSSC. J. Phys. Chem. C, 2015, 119, 11419-11429 (I.F.: 4.309). DOI: 10.1021/acs.jpcc.5b01771

M. V. Haritha, C. V. V. M Gopi, S. K. Kim, J. C. Lee, H. J. Kim*, Solution-processed morphology-controllable nanosphere structured highly efficient and stable nickel sulfide counter electrode for dye-and quantum dot-sensitized solar cells. New J. Chem., 2015, 39, 9575-9585 (I.F.: 3.069). DOI: 10.1039/C5NJ01961C

M. V. Haritha, C. V. V. M Gopi, C. V.  Thulasivarma, S. K. Kim, H. J. Kim*, Influence of Mn⁺² incorporation in CdSe quantum dots for high performance of CdS–CdSe quantum dot sensitized solar cells. J. Photochem. Photobiol. A: Chemistry, 2015, 315, 34-41 (I.F.: 3.261). DOI: 10.1016/j.jphotochem.2015.09.007

S. K. Kim, C. V. V. M Gopi, J. C. Lee, H. J. Kim*, Enhanced performance of branched TiO₂ nanorod based Mn-doped CdS and Mn-doped CdSe quantum dot-sensitized solar cell. J. Appl. Phys., 2015, 117, 163104 (I.F.: 2.328) DOI: 10.1063/1.4918913

H. J. Kim, L. M. Sik, C. V. V. M Gopi*, M. V. Haritha, S. S. Rao, S. K. Kim, Cost-effective and morphology controllable PVP based highly efficient CuS counter electrodes for high-efficiency quantum dot-sensitized solar cells. Dalton Trans., 2015, 44, 11340-11351 (I.F.: 4.052). DOI: 10.1039/C5DT01412C

S. S. Rao, I. K. Durga, C. V. V. M Gopi, C. V. Tulasivarma, S. K. Kim, H. J. Kim*, The effect of TiO₂ nanoflowers as a compact layer for CdS quantum-dot sensitized solar cells with improved performance. Dalton Trans., 2015, 44, 12852-12862 (I.F.: 4.052). DOI:
10.1039/C5DT01783A

C. V. Tulasivarma, S. S. Rao, C. S. S. P. Kumar, C. V. V. M Gopi, I. K. Durga, S. K. Kim, D. Punnoose, H. J. Kim*, Enhanced photovoltaic performance and time varied controllable growth of a CuS nanoplatelet structured thin film and its application as an efficient counter electrode for quantum dot-sensitized solar cells via a cost-effective chemical bath deposition. Dalton Trans., 2015, 44, 19330-19343 (I.F.: 4.052). DOI:10.1039/C5DT02182K

D. Punnoose, H. J. Kim*, C. S. S. P. Kumar, S. S. Rao, C. V. V. M Gopi, S. H. Chung, Highly catalytic counter electrode for dye-sensitized solar cells. J. Photochem. Photobiol. A: Chemistry, 2015, 306, 41-46 (I.F.: 3.261). DOI: 10.1016/j.jphotochem.2015.03.015

H. J. Kim, J. H. Kim, C. S. S. P. Kumar, D. Punnoose, S. K. Kim, C. V. V. M  Gopi, S. S. Rao*, Facile chemical bath deposition of CuS nano peas like structure as a high efficient counter electrode for quantum-dot sensitized solar cells. J. Electroanal. Chem., 2015, 739, 20-27 (I.F.: 3.218) DOI: 10.1016/j.jelechem.2014.12.016

H. J. Kim, C. W. Kim, D. Punnoose, C. V. V. M Gopi, S. K. Kim,  K. Prabakar, S. S. Rao*, Nickel doped cobalt sulfide as a high performance counter electrode for dye-sensitized solar cells. Appl. Surf. Sci., 2015, 328, 78-85 (I.F.: 5.155). DOI: 10.1016/j.apsusc.2014.12.020

S. S. Rao, C. V. Tulasivarma, C. S. S. P. Kumar, C. V. V. M Gopi, S. K. Kim, H. J. Kim*, A strategy to enhance efficiency in dye-sensitized solar cells by highly efficient TiO₂/ZnS photoanode. Dalton Trans., 2015, 328, 2447–2455 (I.F.: 4.052). DOI: 
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H. J. Kim, S. W. Kim, C. V. V. M Gopi*, S. K. Kim, S. S. Rao, M. S. Jeong, Improved performance of quantum dot-sensitized solar cells adopting a highly efficient cobalt sulfide/nickel sulfide composite thin film counter electrode. J. Power Sources, 2014, 268, 163-170 (I.F.: 7.467). DOI: 10.1016/j.jpowsour.2014.06.007

H. J. Kim, T. B. Yeo, S. K. Kim, S. S. Rao, A. D. Savariraj, K. Prabakar,  C. V. V. M  Gopi*, Optimal-Temperature-Based Highly Efficient NiS Counter Electrode for Quantum-Dot-Sensitized Solar Cells. Eur. J. Inorg. Chem., 2014, 2014, 4281–4286 (I.F.: 2.578). DOI: 10.1002/ejic.201402026

S. S. Rao, C. V. V. M Gopi, S. K. Kim, M. K. Son, M. S. Jeong, A. D. Savariraj, K. Prabakar, H. J. Kim*. Cobalt sulfide thin film as an efficient counter electrode for dye-sensitized solar cells. Electrochim. Acta, 2014, 133, 174-179 (I.F.: 5.383). DOI: 10.1016/j.electacta.2014.04.010

H. J. Kim, D. J. Kim, S. S. Rao, A. D. Savariraj, S. K. Kim, M. K. Son, C. V. V. M Gopi, K. Prabakar*, Highly efficient solution processed nanorice structured NiS counter electrode for quantum dot sensitized solar cells. Electrochim. Acta, 2014, 127, 427-432 (I.F.: 5.383). DOI: 10.1016/j.electacta.2014.02.019