G.R.A. Kumara

5.2k total citations · 1 hit paper
94 papers, 4.4k citations indexed

About

G.R.A. Kumara is a scholar working on Renewable Energy, Sustainability and the Environment, Materials Chemistry and Electrical and Electronic Engineering. According to data from OpenAlex, G.R.A. Kumara has authored 94 papers receiving a total of 4.4k indexed citations (citations by other indexed papers that have themselves been cited), including 79 papers in Renewable Energy, Sustainability and the Environment, 59 papers in Materials Chemistry and 21 papers in Electrical and Electronic Engineering. Recurrent topics in G.R.A. Kumara's work include TiO2 Photocatalysis and Solar Cells (77 papers), Advanced Photocatalysis Techniques (63 papers) and Copper-based nanomaterials and applications (24 papers). G.R.A. Kumara is often cited by papers focused on TiO2 Photocatalysis and Solar Cells (77 papers), Advanced Photocatalysis Techniques (63 papers) and Copper-based nanomaterials and applications (24 papers). G.R.A. Kumara collaborates with scholars based in Sri Lanka, Japan and United States. G.R.A. Kumara's co-authors include K. Tennakone, V.P.S. Perera, I. R. M. Kottegoda, K. G. Upul Wijayantha, A. KONNO, P.M. Sirimanne, Masayuki Okuya, A.R. Kumarasinghe, Shinji Kaneko and Masamichi Yoshimura and has published in prestigious journals such as Chemistry of Materials, Journal of Power Sources and Langmuir.

In The Last Decade

G.R.A. Kumara

90 papers receiving 4.3k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Structural Evolution of Hydrothermally Derived Reduced Graphene Oxide

2018 361 citations Hsin‐Hui Huang, Kanishka De Silva et al. Scientific Reports profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
G.R.A. Kumara Sri Lanka	34	2.9k	2.7k	1.6k	807	344	94	4.4k
Xiaoheng Liu China	39	2.6k 0.9×	2.9k 1.1×	2.0k 1.3×	404 0.5×	985 2.9×	103	4.5k
Junhua Yuan China	38	2.1k 0.7×	1.5k 0.5×	2.2k 1.4×	651 0.8×	571 1.7×	96	3.8k
Bifen Gao China	32	3.7k 1.3×	3.1k 1.1×	2.0k 1.2×	368 0.5×	532 1.5×	71	4.5k
Rajendra C. Pawar South Korea	36	1.7k 0.6×	2.4k 0.9×	1.9k 1.2×	560 0.7×	620 1.8×	85	3.6k
Y.M. Hunge India	41	2.6k 0.9×	2.1k 0.8×	1.6k 1.0×	458 0.6×	536 1.6×	71	3.8k
Huyen N. Dinh United States	19	2.6k 0.9×	1.7k 0.6×	1.8k 1.1×	331 0.4×	405 1.2×	62	3.4k
A.A. Yadav India	41	2.3k 0.8×	2.1k 0.8×	2.0k 1.3×	489 0.6×	908 2.6×	75	4.0k
Kugalur Shanmugam Ranjith South Korea	34	1.7k 0.6×	1.9k 0.7×	1.6k 1.0×	319 0.4×	714 2.1×	111	3.5k
Yingying Wang China	36	2.0k 0.7×	2.1k 0.8×	2.9k 1.9×	336 0.4×	925 2.7×	141	4.6k
Zhen‐Huan Sheng China	12	1.8k 0.6×	1.8k 0.6×	3.0k 1.9×	725 0.9×	1.1k 3.1×	18	4.5k

Countries citing papers authored by G.R.A. Kumara

Since Specialization

Citations

This map shows the geographic impact of G.R.A. Kumara's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by G.R.A. Kumara with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites G.R.A. Kumara more than expected).

Fields of papers citing papers by G.R.A. Kumara

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by G.R.A. Kumara. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by G.R.A. Kumara. The network helps show where G.R.A. Kumara may publish in the future.

Co-authorship network of co-authors of G.R.A. Kumara

This figure shows the co-authorship network connecting the top 25 collaborators of G.R.A. Kumara. A scholar is included among the top collaborators of G.R.A. Kumara based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with G.R.A. Kumara. G.R.A. Kumara is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Kumara, G.R.A., et al.. (2025). Palmyrah Seed-Derived Activated Charcoal/TiO₂ Composites as a Counter Electrode for Dye-Sensitized Solar Cells. ACS Omega. 10(35). 39415–39425.

Bandara, T. M. W. J., et al.. (2025). Enhancing quasi solid-state dye-sensitized solar cell performance by encapsulating n-TiO2 nanocrystallite-multi-layers by p-La2O3 charge separating layer. Journal of Power Sources. 661. 238689–238689.

Dissanayake, M.A.K.L., G.K.R. Senadeera, T. M. W. J. Bandara, et al.. (2025). Sustainable coconut shell charcoal counter electrodes for efficiency enhancement in CdS quantum dot solar cells. Ionics. 31(4). 3559–3573. 2 indexed citations

Bandara, T. M. W. J., et al.. (2024). Strategic graphene integration in multilayer photoanodes for enhanced quasi-solid-state dye-sensitized solar cells and performance under variable irradiance. Journal of Applied Electrochemistry. 55(3). 691–707. 1 indexed citations

Bandara, T. M. W. J., et al.. (2024). Dye-sensitized solar cells achieved with multi-layered SnO2/ZnO composite photoanodes through precise control of thickness and composition. Journal of Materials Science Materials in Electronics. 35(33). 2 indexed citations

Cojocaru, Ludmila, Satoshi Uchida, R.M.G. Rajapakse, et al.. (2024). Effect of Triton X-100 surfactant concentration on the wettability of polyethylene-based separators used in supercapacitors. Journal of Science Advanced Materials and Devices. 9(4). 100801–100801. 3 indexed citations

Kumara, G.R.A., et al.. (2024). An electrical double-layer supercapacitor based on a biomass-activated charcoal electrode and ionic liquid with excellent charge-discharge cycle stability . Journal of the National Science Foundation of Sri Lanka. 52(3). 331–341.

Dunuweera, Shashiprabha P., Dhayalan Velauthapillai, Punniamoorthy Ravirajan, et al.. (2023). Low-Cost Perovskite Solar Cell Fabricated using the Expanded Graphite Back Contact and Electronically Conducting Activated Carbon as the Hole Transporting Material. ACS Omega. 8(26). 23501–23509. 11 indexed citations

Silva, Kanishka De, et al.. (2023). Sustainable mining of natural vein graphite via acid-extraction from waste attached to rock pieces of vein banks. Scientific Reports. 13(1). 14737–14737. 1 indexed citations

10.

Rajapakse, R.M.G., et al.. (2023). Stability and efficiency improvement of TiO2-based dye-sensitized solar cells by surface modification of MgO. Journal of Solid State Electrochemistry. 27(10). 2681–2690. 3 indexed citations

11.

Kumara, G.R.A., et al.. (2022). Life Cycle Assessment of Supercapacitor Electrodes Based on Activated Carbon from Coconut Shells. ACS Sustainable Chemistry & Engineering. 10(46). 15025–15034. 38 indexed citations

12.

Dunuweera, Shashiprabha P., et al.. (2021). Impact of 4-Tertiary-butylpyridine in Imidazolium Iodide/Triiodide Redox Couple-Based Dye-Sensitized Solar Cells. ACS Applied Energy Materials. 4(9). 9393–9401. 3 indexed citations

13.

Kumara, G.R.A., M.M.M.G.P.G. Mantilaka, R.M.G. Rajapakse, et al.. (2021). Development of a chemical-free floatation technology for the purification of vein graphite and characterization of the products. Scientific Reports. 11(1). 22713–22713. 12 indexed citations

14.

Dourges, Marie‐Anne, David Talaga, Laurent Servant, et al.. (2021). Graphite-type activated carbon from coconut shell: a natural source for eco-friendly non-volatile storage devices. RSC Advances. 11(5). 2854–2865. 147 indexed citations

15.

Huang, Hsin‐Hui, Kanishka De Silva, G.R.A. Kumara, & Masamichi Yoshimura. (2018). Structural Evolution of Hydrothermally Derived Reduced Graphene Oxide. Scientific Reports. 8(1). 6849–6849. 361 indexed citations breakdown →

16.

Onwona‐Agyeman, Boateng, Abu Yaya, G.R.A. Kumara, & Motoi Nakao. (2018). Light-soaking tests of zinc oxide photoanodes sensitized with an indoline dye on different transparent conductive substrates. AIMS energy. 6(6). 949–958. 1 indexed citations

17.

Premalal, E.V.A., G.R.A. Kumara, R.M.G. Rajapakse, et al.. (2010). Tuning chemistry of CuSCN to enhance the performance of TiO2/N719/CuSCN all-solid-state dye-sensitized solar cell. Chemical Communications. 46(19). 3360–3360. 42 indexed citations

18.

Premalal, E.V.A., et al.. (2008). A high efficiency indoline-sensitized solar cell based on a nanocrystalline TiO₂surface doped with copper. Nanotechnology. 19(48). 485703–485703. 32 indexed citations

19.

Tennakone, Kirthi, et al.. (2001). Enhanced Efficiency of a Dye-Sensitized Solar Cell Made from MgO-Coated Nanocrystalline SnO_2 : Semiconductors. Japanese Journal of Applied Physics. 40(7). 6 indexed citations

20.

Tennakone, K., G.R.A. Kumara, I. R. M. Kottegoda, & V.P.S. Perera. (1999). An efficient dye-sensitized photoelectrochemical solar cell made from oxides of tin and zinc. Chemical Communications. 15–16. 270 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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