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Efficient Nonlead Double Perovskite Solar Cell with Multiple Hole Transport Layers
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-09-18 , DOI: 10.1021/acsaem.0c01066
Zehao Zhang 1 , Cuncun Wu 1 , Duo Wang 1 , Qiaohui Zhang 1 , Yuqing Zhang 1 , Xuan Guo 1 , Yinan Lao 1 , Bo Qu 1 , Lixin Xiao 1 , Zhijian Chen 1
Affiliation  

Cs2AgBiBr6 having a double perovskite structure is expected to be used in nonlead and stable optoelectronic devices and has received wide attention recently. At this stage, structures of optoelectronic devices using double perovskite and hybrid perovskite are the same. And the energy band structures of double perovskite and hybrid perovskite are different, which will cause energy-level mismatch in the device with double perovskite, which in turn will seriously restrict further improvement of the device performance. A strategy to solve this problem by constructing energy-level gradients with poly(3-hexylthiophene) (P3HT)/MoO3/poly[bis(4-phenyl)(2,4,6-trimethylphenyl)-amine] (PTAA) was reported for the first time. The construction of energy-level gradient is mainly achieved by P3HT and PTAA. MoO3 plays a role in protecting the substrate (P3HT) and does not hinder hole transport because it is itself a p-type semiconductor. The champion power conversion efficiency of devices with P3HT/MoO3/PTAA is improved by more than a quarter compared to the standard devices. Moreover, in the champion device, the power conversion efficiency achieved 1.94% with a short-circuit current of 2.80 mA/cm2.

中文翻译:

具有多个空穴传输层的高效无铅双钙钛矿太阳能电池

具有双钙钛矿结构的Cs 2 AgBiBr 6有望用于无铅且稳定的光电器件中,并且近来受到广泛关注。在这个阶段,使用双重钙钛矿和混合钙钛矿的光电器件的结构是相同的。双钙钛矿和混合钙钛矿的能带结构不同,这将导致双钙钛矿在器件中的能级失配,进而严重限制器件性能的进一步提高。通过使用聚(3-己基噻吩)(P3HT)/ MoO 3构建能级梯度来解决此问题的策略首次报道了聚[双(4-苯基)(2,4,6-三甲基苯基)-胺](PTAA)。能级梯度的构建主要是通过P3HT和PTAA实现的。MoO 3本身是p型半导体,因此在保护衬底(P3HT)方面起着作用并且不会阻碍空穴传输。与标准设备相比,具有P3HT / MoO 3 / PTAA的设备的最佳电源转换效率提高了四分之一以上。此外,在冠军装置中,在2.80mA / cm 2的短路电流下,功率转换效率达到了1.94%。
更新日期:2020-10-26
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