開發有機陽離子於穩定高效能錫鈣鈦礦太陽能電池之應用

Development of organic cations for highly efficient and stable tin-based perovskite solar cells

簡呈勳(Cheng-Hsun Chien)

指導教授 ： 刁維光

國立交通大學/理學院/應用化學系所/碩士(2018年)

摘要

本篇論文主要以無鉛錫鈣鈦礦為主，做為鈣鈦礦太陽能電池中的光吸收層，並依序沉積電洞傳輸層PEDOT:PSS，錫鈣鈦礦吸光層，電子傳輸層，最後在蒸鍍銀，製備正型平板鈣鈦礦太陽能電池，並以FASnI3為主要架構，首先透過摻混有機陽離子的方式，大幅改善薄膜質量，並大幅提升元件各方面的表現，在有摻雜BAI與EDAI2的元件最高效率，初製備時分別為5.5%與7.4%，特別在EDAI2摻混的元件中觀察到緩慢鈍化薄膜表面與內部晶體應變鬆弛的現象，有助於提升元件之長效穩定性表現，在經過兩千小時封裝且存放手套箱中，最高效率可以提升至8.9%。
另外將體積較大的胍鹽陽離子引入FASnI3鈣鈦礦中，並添加1% EDAI2，不僅僅提升初製備時的效率，也提升元件的照光穩定性與長效穩定性，然而初製備時最高效率為8.5%，經過約兩千小時後，最高效率更是高達9.6%，是目前無鉛錫鈣鈦礦所獲得最高效率之一，我們也將初製備時的元件封裝後送去RCNPV-PVEVL,National Central Univerity進行效率驗證獲得8.3%效率，也世界上首次能夠將錫鈣鈦礦的太陽能電池進行效率認證。

關鍵字

鈣鈦礦 ； 無鉛 ； 錫鈣鈦礦

並列摘要

This thesis is mainly based on lead-free tin perovskite, as a light absorbing layer in the inverted planar heterojunction (PHJ) perovskite solar cell. FASnI3 is used as perovskite layer. In the first part, by employing varied organic cations, the quality of the thin film was greatly improved. Additionally, the various performance parameters were extremely enhanced in the presence of BAI and EDAI2 as additives. The highest efficiency was obtained for fresh devices employing BAI and EDAI2 is 5.5% and 7.4%, respectively. In particular, the phenomenon of slow surface passivation and relaxation of crystal strain was observed in the EDAI2, which contributes to the long-term stability performance. After two thousand hours with encapsulation and storaged in the glove box, the maximum efficiency increased to 8.9%.
For the second part, larger guanidinium cations were introduced into the FASnI3 perovskite, and 1% EDAI2 as additive not only improved the efficiency at the time of initial preparation, but also improved the light soaking and long-term stability of the device. The highest efficiency obtained for fresh device was 8.5% and after 2,000 hours, the maximum efficiency was as high as 9.6%, which is one of the highest efficiencies that lead-free tin perovskite has obtained so far. The device that was initially prepared was encapsulated and sent to RCNPV-PVEVL, National Central Univerity. It is the first time in the world that tin-based devices were able to pass all severe certification steps and an efficiency of 8.3% was certified.

並列關鍵字

Perovskite ； Lead-free ； Tin perovskite

參考文獻

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