The novel ionic cellulose derivative with cyano-imidazolium cation and chloride anion, designed from natural cellulose, promotes the crystallization process, grain growth, and orientation of perovskite in perovskite solar cells (PSCs).

The use of ionic cellulose leads to the suppression of defect formation, reduction of grain boundaries, enhancement of carrier extraction, and inhibition of non-radiative recombination, resulting in a high power conversion efficiency of 24.71% in PSCs.

The biopolymer-based approach enables excellent stability of PSCs, which maintain over 91.3% of their initial efficiencies after 3000 h in conventional air atmosphere.

这种新型离子纤维素衍生物具有氰基咪唑鎓阳离子和氯阴离子，由天然纤维素设计而成，可促进钙钛矿太阳能电池（PSC）中钙钛矿的结晶过程、晶粒生长和取向。

离子纤维素的使用可以抑制缺陷形成、减少晶界、增强载流子提取和抑制非辐射复合，从而使PSC的功率转换效率高达24.71%。

基于生物聚合物的方法使 PSC 具有出色的稳定性，在传统空气气氛中 3000 小时后仍保持其初始效率的 91.3% 以上。