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Development of a Perovskite Solar Cell Architecture for Opaque Substrates
Solar RRL ( IF 6.0 ) Pub Date : 2020-09-16 , DOI: 10.1002/solr.202000385
Benjamin T. Feleki 1 , Sanjana Chandrashekar 2 , Ricardo K. M. Bouwer 2 , Martijn M. Wienk 1 , René A. J. Janssen 1, 3
Affiliation  

To date, substrate‐configuration metal‐halide perovskite solar cells (PSCs) fabricated on opaque substrates such as metal foils provide inferior efficiencies compared with superstrate‐configuration cells on transparent substrates such as glass. Herein, a substrate‐configuration PSC on planarized steel is presented. To quantify the differences between the two configurations, a 15.6%‐efficient n–i–p superstrate‐configuration PSC is transformed step wise into a substrate‐configuration cell. Guided by optical modeling, the opaque Au electrode is replaced by a transparent MoO3/thin Au/polystyrene dielectric–metal–dielectric electrode. The semitransparent device affords efficiencies of 15.4% and 11.4% for bottom and top illumination, respectively. Subsequently, substrate‐configuration PSCs with a metal bottom electrode are fabricated on glass and planarized steel, using a thin MoO3 interlayer between the Au bottom electrode and the SnO2 electron transport layer. The glass‐based substrate‐configuration cell provides 14.0% efficiency with identical open‐circuit voltage and fill factor as the superstrate cell. The cell on planarized steel reaches 11.5% efficiency due to a lower fill factor. For both substrate‐configuration cells, the lower short‐circuit current density limits the efficiency. Optical modeling explains this quantitatively to be due to absorption and reflection by the top electrode and absorption by the organic hole transport layer.

中文翻译:

不透明基板的钙钛矿型太阳能电池架构的开发

迄今为止,与不透明基板(如金属箔)上制造的基板配置金属卤化物钙钛矿太阳能电池(PSC)相比,在玻璃等透明基板上的超基板配置电池的效率较低。本文介绍了在平面钢上的基材配置PSC。为了量化两种配置之间的差异,将效率为15.6%的n–i–p超级基板配置PSC逐步转换为基板配置单元。在光学建模的指导下,不透明的Au电极被透明的MoO 3代替/薄金/聚苯乙烯介电-金属-介电电极。半透明设备的底部和顶部照明效率分别为15.4%和11.4%。随后,使用金底部电极和SnO 2之间的薄MoO 3中间层,在玻璃和平面钢上制造具有金属底部电极的基板配置PSC。电子传输层。基于玻璃的基板配置单元可提供14.0%的效率,并且开路电压和填充系数与上基板相同。由于填充系数较低,平面钢上的电池效率达到11.5%。对于两个基板配置单元,较低的短路电流密度都会限制效率。光学建模定量地解释了这是由于顶部电极的吸收和反射以及有机空穴传输层的吸收。
更新日期:2020-11-06
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