钙钛矿薄膜缺陷调控策略在太阳能电池中的应用

王万海, 周杰, 唐卫华

Passivation Strategies of Perovskite Film Defects for Solar Cells

WANG Wanhai, ZHOU Jie, TANG Weihua

图4 (a)MAPbI3钙钛矿薄膜结晶过程示意图[39]; (b)咖啡因结构式[41]; (c)纯咖啡因、咖啡因处理和原始MAPbI3钙钛矿膜的红外光谱(FT-IR)和指纹区红外光谱的放大图[41]; (d) PbI2-PMMA和纯PMMA膜的红外光谱[43]; (e)无添加剂(左)和添加0.6 mg∙mL-1 TDZDT (右)的钙钛矿薄膜的SEM照片[44]; (f)采用NMP生成FAPbI3钙钛矿薄膜的照片和过程示意图[45]; (g)SP1, SP2和SP3的化学结构式[48]; (h)给体-受体分子钝化配位不足的Pb2 +的过程示意图[48]; (i)由空间电荷限制电流(SCLC)方法测量得到的对照钙钛矿膜和钝化钙钛矿膜的统计陷阱态密度[48]

Fig. 4 (a) Schematic diagram of MAPbI3 perovskite films crystallization processes[39]; (b) Chemical structure of caffeine[41]; (c) Fourier Transform infrared spectroscopy (FT-IR) spectra and magnified fingerprint regions of pure caffeine, caffeine-MAPbI3, and the pristine MAPbI3 films[41]; (d) FT-IR spectra of PbI2-PMMA and pristine PMMA films[43]; (e) Top view SEM images of perovskite films without (left) and with (right) 0.6 mg∙mL-1 TDZDT [44]; (f) Photographs and schematic process for formation of FAPbI3 perovskite films by using NMP[45]; (g) Chemical structures of SP1, SP2 and SP3[48]; (h) Schematic illustration of the passivation process of donor-acceptor molecules for under-coordinated Pb2+ cations[48]; (i) Statistic trap densities for the control and passivated perovskite films derived from the space charge limit current (SCLC) measurement[48]