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Journal Article
Color-tunable and conductive ITO-based multilayer electrodes for Cu(In,Ga)Se2 thin-film solar cells
- Authors
- Rina Kim, Dae-Hyung Cho, Woo-Jung Lee, Tae-Ha Hwang, Mangu Kang, Donghyeop Shin, Kihwan Kim, Yong-Duck Chung
- Issue Date
- 2026-08
- Citation
- Dyes and Pigments, v.251, pp.1-9
- ISSN
- 0143-7208
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- To achieve color tunability and electrical conductivity in the front electrodes of thin film solar cells, an indium tin oxide (ITO)-based color filter is designed and fabricated by depositing ITO thin films with various SnO2 contents via a radio-frequency sputtering process. ITO films containing 5 wt% and 20 wt% SnO2 are selected for multilayer stacking, as they exhibit a significant difference in refractive index while maintaining high electrical conductivity. By alternately stacking these two types of ITO films, a multilayer structure capable of generating diverse visible colors is successfully fabricated. The interfaces between the layers are sharply defined without noticeable interlayer diffusion, enabling precise compositional control that contributed to accurate and consistent optical performance. In addition to its color tunability, the ITO-based multilayer exhibits high optical transmittance and excellent electrical conductivity, making it suitable for application as a transparent front electrode in Cu(In,Ga)Se2 solar cells. The short-circuit current densities (Jsc), derived from external quantum efficiency (EQE) analysis, ranged from 25.60 to 30.25 mA/cm2 for the color-filtered devices. These results demonstrate that ITO multilayer color filters provide coloration while preserving effective current generation in thin-film solar cells.
- Keyword
- Conductive multilayer, Indium tin oxide (ITO), Color filter, Cu(In,Ga)Se2 solar cells
- KSP Keywords
- Current generation, Effective current, External Quantum Efficiency, High electrical conductivity, ITO films, ITO thin films, Indium Tin Oxide(ITO), Interlayer diffusion, Multilayer electrode, Optical performance, Radio-frequency sputtering
This work is distributed under the term of Creative Commons License (CCL)
(CC BY ND)
(CC BY ND)
