噴塗法製備無鉛雙鈣鈦礦太陽能電池

Spray-coated lead-free double perovskites for solar cells

有機無機鹵化物鈣鈦礦太陽能電池具備高轉換效率為有潛力的太陽能電池。然而，吸收層含鉛和穩定性不佳的問題，使商品化過程具備挑戰。本研究透過開發雙鈣鈦礦材料來達到無鉛與穩定性改善，並製作成雙鈣鈦礦太陽能電池進行性能探討。實驗上使用噴塗法製備二氧化錫電子傳輸層和雙鈣鈦礦吸收層Cs2AgBiBr6，透過噴塗條件探討二氧化錫薄膜均勻性、透明度和覆蓋度，並比較不同噴塗環境來優化Cs2AgBiBr6雙鈣鈦礦吸收層薄膜性質，並成功製備出雙鈣鈦礦薄膜太陽能電池。

Organic-inorganic halide perovskite solar cells have been paid much attention because of their high conversion efficiency. However, the absorber layer involved with lead element and poor stability can limit the commercialization. In the study, the spray coating was firstly developed to prepare the electron transport layer of tin oxides and the absorber layer of Cs2AgBiBr6 double perovskites. The effects of spray parameters on film uniformity, transmittance, and coverage of tin oxides were investigated. Besides, the absorber layer of Cs2AgBiBr6 was optimized by the spray coating under different environments. The solar cell based on spray-coated Cs2AgBiBr6 was successfully made to evaluate the performance.