卤化物
钙钛矿(结构)
光伏系统
碘化物
钙钛矿太阳能电池
太阳能电池
材料科学
化学工程
甲脒
无机化学
能量转换效率
离子液体
化学
三碘化物
有机化学
工程类
电气工程
作者
Mohammad Hayal Alotaibi,Yahya Alzahrani,Neha Arora,Ahmed Y. Alyamani,Abdulrahman M. Albadri,Hamad Albrithen,Ibrahim Al-Lehyani,Sultan M. Alenzi,Ali Z. Alanzi,Fahad S. Alghamdi,Shaik M. Zakeeruddin,Simone Meloni,M. Ibrahim Dar,Michael Gräetzel
出处
期刊:Solar RRL
[Wiley]
日期:2019-07-26
卷期号:4 (2)
被引量:19
标识
DOI:10.1002/solr.201900234
摘要
The impacts of halide and nonhalide sources of guanidinium cations, including guanidinium chloride (GCl) ((NH 2 ) 3 CCl) and guanidinium thiocyanate (GTC) ((NH 2 ) 3 CSCN), are comparatively analyzed on the structural, morphological, and photophysical properties of (CsMAFA)PbBr x I 3 − x ( x = 0.17) (MA = methylammonium, FA = formamidinium) perovskite films. X‐ray diffraction (XRD) reveals that the formation of photoinactive phases depends on the nature of counterions (halide vs nonhalide). Furthermore, morphological analysis shows that with the addition of guanidinium salts, the apparent grain size decreases due to the enhancement of nucleation density and/or slow growth of perovskite structures. More importantly, the introduction of GCl leads to the fabrication of perovskite solar cells (PSCs), yielding a photovoltage as high as 1.16 V (1.1 V for reference). In contrast, the introduction of GTC minimally affects the photovoltage, underlining the significance of counterions in improving the photovoltage of PSCs. The present preliminary results of the density functional theory based theoretical investigation related to the effect of G cation on the structure of the perovskite system is presented. In summary, the insights gained through structural and morphological characterization helps to understand the critical role of counterions of guanidinium salts in PSCs.
科研通智能强力驱动
Strongly Powered by AbleSci AI