| 초록 |
Currently, kesterite-based TFSCs have been studied mainly on a rigid soda-lime glass (SLG) substrate. When thinner and lighter flexible substrates are used instead of conventional SLG substrates, it allows more advantageous roll-to-roll processes to be used. In the present work, we further fine-tuned the Zn composition in the absorber layer and optimized the post-preparative parameters, which led to a record conversion efficiency of ~8% being achieved. However, considering that the best efficiency on a SLG substrates is 12.6%, technical discussions are needed to achieve higher efficiency than ~8%. There are many different approahces to improve cell efficiency, but we try to focus on the control of absorber and absorber interface such as alkali elements doping, deep-level defects control, and band gap grading. Therefore, in the near future, we expect to make the flexible CZTSSE TFSCs with higher efficiency. |
