Improved Work Function of Poly(3,4-ethylenedioxythiophene): Poly(styrenesulfonic acid) and its Effect on Hybrid Silicon/Organic Heterojunction Solar Cells

被引：0
作者：
Xiaojuan Shen
Ling Chen
Jianmei Pan
Yue Hu
Songjun Li
Jie Zhao
机构：
[1] Jiangsu University,Institute of Polymer Materials, School of Materials Science & Engineering
[2] Soochow University,College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology
来源：
Nanoscale Research Letters | 2016年 / 11卷
关键词：
Work function; Crystalline silicon; PEDOT:PSS; Carrier recombination; Heterojunction solar cells;
D O I：
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中图分类号：
学科分类号：
摘要：
Hybrid silicon/organic solar cells have been recently extensively investigated due to their simple structure and low-cost fabrication process. However, the efficiency of the solar cells is greatly limited by the barrier height as well as the carrier recombination at the silicon/organic interface. In this work, hydrochloroplatinic acid (H2PtCl6) is employed into the poly(3,4-ethlenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) solution, and the work function (WF) of the PEDOT:PSS layer has been successfully improved. Based on the Pt-modified PEDOT:PSS layer, the efficiency of the silicon/PEDOT:PSS cell can be increased to 11.46%, corresponding to ~20% enhancement to the one without platinum (Pt) modification. Theoretical and experimental results show that, when increasing the WF of the PEDO:PSS layer, the barrier height between the silicon/PEDOT:PSS interface can be effectively enhanced. Meanwhile, the carrier recombination at the interface is significantly reduced. These results can contribute to better understanding of the interfacial mechanism of silicon/PEDOT:PSS interface, and further improving the device performance of silicon/organic solar cells.
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