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Influence of Donor Groups on Benzoselenadiazole-Based Dopant-Free Hole Transporting Materials for High Performance Perovskite Solar Cells
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-12-30 , DOI: 10.1021/acsaem.0c02264 Abdullah 1 , Eun-Bi Kim 2 , M. Shaheer Akhtar 3 , Hyung-Shik Shin 2, 4 , Sadia Ameen 1 , Mohammad Khaja Nazeeruddin 5
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-12-30 , DOI: 10.1021/acsaem.0c02264 Abdullah 1 , Eun-Bi Kim 2 , M. Shaheer Akhtar 3 , Hyung-Shik Shin 2, 4 , Sadia Ameen 1 , Mohammad Khaja Nazeeruddin 5
Affiliation
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The designed hole-transporting materials (HTMs) of asymmetric and symmetric benzoselenadiazole based molecules, referred as RSe-CF, RSe-TPA, and RSe-R, were synthesized and employed for improving the charge conduction and performance of mixed-halide (Cs0.03FA0.97PbI2.9Br0.1) perovskite solar cells (PSCs). In this work, the effects of different acceptor/donor units like 3,5-bis(trifluoromethyl) benzene (CF), alkyl thiophene (R), and triphenylamine (TPA) in benzoselenadiazole were investigated and their optoelectronic, structural, thermal, and photovoltaic properties were studied. The optical and electrochemical results of RSe-CF, RSe-TPA, and RSe-R exhibited the alternation of the energy levels for efficient interfacial charge transfer with mixed-halide Cs0.03FA0.97PbI2.9Br0.1. RSe-TPA HTM-based PSCs displayed the highest power conversion efficiency (PCE) of ∼17.3%, whereas PSCs based on RSe-CF and RSe-R HTMs displayed low PCEs of ∼12.4% and ∼15.9%, respectively. The PCE with a new RSe-TPA HTM is comparable to the PCE of the state-of-the-art HTM Spiro-OMeTAD. Observation of large quenching in photoluminescence spectra of the HTM/Cs0.03FA0.97PbI2.9Br0.1 thin film supported the effective hole injection from perovskite’s valence band to HOMO of HTMs, resulting in high PCE and high photocurrent density.
中文翻译：
施主基团对高效钙钛矿型太阳能电池中基于苯并硒二唑的无掺杂空穴传输材料的影响
非对称和对称苯并硒二唑基的分子，称为的设计的空穴输送材料（HTMS）RSe- CF，的RSe-TPA，和的RSe-R ，被合成并用于改善电荷传导和混合卤化物的性能（CS 0.03 FA 0.97 PbI 2.9 Br 0.1）钙钛矿太阳能电池（PSC）。在这项工作中，研究了3,5-双（三氟甲基）苯（CF），烷基噻吩（R）和三苯胺（TPA）等不同受体/给体单元在苯并硒二唑中的作用，并研究了它们的光电，结构，热和化学性质。研究了光伏性能。RSe-的光学和电化学结果CF，RSe-TPA和RSe-R表现出能与混合卤化物Cs 0.03 FA 0.97 PbI 2.9 Br 0.1进行有效界面电荷转移的能级交替。的RSe-TPA基于HTM-的PSC显示的~17.3％的最高能量转换效率（PCE），而基于的PSC RSe- CF和的RSe-R HTMS显示的~12.4％和~15.9％的低的PCE，分别。具有新的RSe-TPA HTM的PCE与最新的HTM Spiro-OMeTAD的PCE相当。HTM / Cs 0.03 FA的光致发光光谱中的大猝灭观察0.97 PbI 2.9 Br 0.1薄膜支持了从钙钛矿价带到HTM HOMO的有效空穴注入，从而实现了高PCE和高光电流密度。
更新日期：2021-01-25
中文翻译：
施主基团对高效钙钛矿型太阳能电池中基于苯并硒二唑的无掺杂空穴传输材料的影响
非对称和对称苯并硒二唑基的分子，称为的设计的空穴输送材料（HTMS）RSe- CF，的RSe-TPA，和的RSe-R ，被合成并用于改善电荷传导和混合卤化物的性能（CS 0.03 FA 0.97 PbI 2.9 Br 0.1）钙钛矿太阳能电池（PSC）。在这项工作中，研究了3,5-双（三氟甲基）苯（CF），烷基噻吩（R）和三苯胺（TPA）等不同受体/给体单元在苯并硒二唑中的作用，并研究了它们的光电，结构，热和化学性质。研究了光伏性能。RSe-的光学和电化学结果CF，RSe-TPA和RSe-R表现出能与混合卤化物Cs 0.03 FA 0.97 PbI 2.9 Br 0.1进行有效界面电荷转移的能级交替。的RSe-TPA基于HTM-的PSC显示的~17.3％的最高能量转换效率（PCE），而基于的PSC RSe- CF和的RSe-R HTMS显示的~12.4％和~15.9％的低的PCE，分别。具有新的RSe-TPA HTM的PCE与最新的HTM Spiro-OMeTAD的PCE相当。HTM / Cs 0.03 FA的光致发光光谱中的大猝灭观察0.97 PbI 2.9 Br 0.1薄膜支持了从钙钛矿价带到HTM HOMO的有效空穴注入，从而实现了高PCE和高光电流密度。
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