钙钛矿(结构)
光电导性
带隙
太阳能电池
材料科学
光谱学
光电子学
红外光谱学
分子
结晶学
化学
有机化学
量子力学
物理
作者
Bat‐El Cohen,Tal Binyamin,Tzipora Ben-Tzvi,Oren Goldberg,Adi Schlesinger,I. Balberg,Oded Millo,Elad Gross,Doron Azulay,Lioz Etgar
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2021-12-14
卷期号:7 (1): 217-225
被引量:19
标识
DOI:10.1021/acsenergylett.1c01990
摘要
In this work we demonstrate a new diammonium spacer molecule with hydroxyl functional groups forming a Dion–Jacobson perovskite. Polarization modulation infrared reflection absorption spectroscopy reveal hydrogen bonding between the iodide to the spacer molecule and in between the OH groups. As a result, we were able to demonstrate n = 5 low dimensional perovskite solar cell (LDPSC) with an efficiency of 10%. Photoconductivity measurements and scanning tunneling spectroscopy draw the band structure of this low dimensional perovskite (LDP) revealing in-gap states adjacent to the conduction band edge, consistent with Shockley–Reed–Hall modeling of the temperature-dependent photoconductivity. The LDPSC based on the diammonium spacer H3N–C4H6(OH)2–NH3 shows enhanced stability under a relative humidity of more than 50% over 1030 h. Evaluating the mechanism of the cell shows a misalignment of the hole selective contact with the LDP. Improving this interface can increase further the photovoltaic performance, demonstrating the potential of this new type of diammonium spacer in LDP.
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