Black phosphorus induced photo-doping for high-performance organic-silicon heterojunction photovoltaics

作     者：Zhouhui Xia Pengfei Li Yuqiang Liu Tao Song Qiaoliang Bao Shuit-Tong Lee Baoquan Sun 

作者机构：Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Institute of Functional Nano and Soft Materials(FUNSOM)Soochow University Suzhou 215123 China Department of Materials Science and Engineering Monash University Clayton Victoria 3800 Australia 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2017年第10卷第11期

页      面：3848-3856页

核心收录：

学科分类：07[理学] 

基　　金：This work was supported by the National Basic Research Program of China (973 Program) (No. 2012CB932402)  National Natural Science Foundation of China (Nos. 91123005 and 61674108)  Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices  the Priority Academic Program Development of Jiangsu Higher Education Institutions and Collaborative Innovation Centre of Suzhou Nano Science and Technology 

主　　题：black phosphorus zinc oxide light induced dopant photovoltaics 

摘      要：In conventional crystalline silicon （Si） homojunction solar cells,a strategy of doping by transporting phosphorus or boron impurities into Si is commonly used to build Ohmic contacts at rear ***,this technique involves an energy intensive,high temperature （～ 800 ℃） process and toxic doping *** phosphorus （BP） is a two-dimensional,narrow bandgap semiconductor with high carrier mobility that exhibits broad light harvesting ***,we place BP：zinc oxide （ZnO） composite films between Si and aluminum （Al） to improve their *** the BP harvests photons with energies below 1.1 eV from the crystalline Si,the ZnO carrier concentration increases dramatically due to charge *** photo-induced doping results in a high carrier concentration in the ZnO film,mimicking the modulated doping technique used in semiconductor *** show that photo-induced carriers dramatically increase the conductivities of the BP-modified ZnO films,thus reducing the contact resistance between Si and Al.A photovoltaic power conversion efficiency of 15.2% is achieved in organic-Si heterojunction solar cells that use a ZnO：BP *** findings demonstrate an effective way of improving Si/metal contact via a simple,low temperature process.