High-performance hybrid perovskite solar cells with open circuit voltage dependence on hole-transporting materials
High-performance hybrid perovskite solar cells with open circuit voltage dependence on hole-transporting materials
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DOI：
10.1016/j.nanoen.2015.07.024
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发表时间：
2015-09
期刊：
影响因子：
17.6
通讯作者：
Weibo Yan;Yunlong Li;Yu Li;Senyun Ye;Zhiwei Liu;Shufeng Wang;Z. Bian;Chunhui Huang
中科院分区：
文献类型：
--
作者：
Weibo Yan;Yunlong Li;Yu Li;Senyun Ye;Zhiwei Liu;Shufeng Wang;Z. Bian;Chunhui Huang
采用电化学聚合法制备了聚对苯撑（PPP）、聚噻吩（PT）和聚（4，4 ′-双（N-咔唑基）-1，1 ′-联苯）（PPN）等导电聚合物，并探讨了它们作为空穴传输层在CH 3 NH3 PbI 3钙钛矿太阳能电池中的应用。具有ITO/导电聚合物/CH 3 NH3 PbI 3/C60/BCP/Ag构造的相应器件的开路电压与用作空穴选择性接触材料的导电聚合物的功函数以及器件的复合电阻直接相关。最高的开路电压为1.05 V的器件上获得的PPP具有-5.31 eV的功函数作为空穴传输层。其功率转换效率达到约16.5%，具有0.75的高填充因子，1.03 V的良好开路电压和21.6 mA cm−2的短路电流密度。结果表明，功函数约为-5.3 eV的高导电空穴传输材料与该器件结构更相容，以提供所需的空穴选择性接触。这种简单、快速、可控、经济的空穴传输材料制备方法将有利于钙钛矿太阳能电池空穴传输层的大规模制备。
A series of conductive polymers, including poly(p-phenylene) (PPP), polythiophene (PT) and poly(4,4′-bis(N-carbazolyl)-1,1′-biphenyl) (PPN), were prepared via the electrochemical polymerization and their application as hole-transporting layer in CH3NH3PbI3perovskite solar cells was explored. The open circuit voltage of the corresponding devices with an ITO/conductive-polymer/CH3NH3PbI3/C60/BCP/Ag construction was correlated directly with the work functions of the conductive polymers that served as the hole-selective contact materials to the perovskite layer, as well as the recombination resistances of the devices. Highest open circuit voltage of 1.05 V was obtained on the devices with PPP that has a work function of −5.31 eV as the hole-transporting layer. Its power conversion efficiency reached about 16.5% with a high fill factor of 0.75, good open voltage of 1.03 V and short circuit current-density of 21.6 mA cm−2. The results indicated that high conductive hole-transporting material with a work function about −5.3 eV is more compatible with this device construction to afford desired hole-selective contact. Furthermore, this simple, prompt, controllable and economic method to prepare hole-transporting materials would be favorable for large-scale production of hole-transporting layer for perovskite solar cells.