Multi-stage paste coating method for low cost and high efficiency CIGS thin film solar cells
- Multi-stage paste coating method for low cost and high efficiency CIGS thin film solar cells
- 전효상; 안희상; 고재현; 민병권
- CIGS; low cost; past coating
- Issue Date
- 2014 MRS Spring Meeting
- Fabrication of CIGS thin film based on a precursor solution has been attracted because it is possible to make low cost and tunable band gap thin film. In this study, in particular, multiple coatings with two different precursor solution pastes were applied to achieve more efficient fabrication of CIGS thin films (fewer coating and drying cycles) and an improved solar cell performance. Paste A using polyvinyl acetate as a binder material is enable to make a thin and dense layer for high efficiency solar cell performance but required several coating and drying cycles for the proper film thickness. On the other hand, paste B using ethylcellulose lead to form relatively thick films in spite of less number of spin-coating process but the porosity of CIGS films limited the solar cell performance. Multiple coating with the two pastes conducted three type of configurations of CIGS films (A + B, B + A, and A + B + A) for a combination of the advantage of each paste. The A + B configuration showed the best solar cell efficiency (4.66%) compared with other configurations. The details will be discussed in the presentation.
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