journal article·2020-08-12

Bilayer MoOX/CrOX Passivating Contact Targeting Highly Stable Silicon Heterojunction Solar Cells

Jingye Li, Tianyu Pan, Jilei Wang, Shuangying Cao, Yinyue Lin, Bram Hoex, Zhongquan Ma, Linfeng Lu, Liyou Yang, Baoquan Sun, Dongdong Li

ACS Applied Materials & Interfaces· Volume 12· Issue 32
Publisher page

Abstract

Molybdenum oxide (MoOX, X < 3) has been successfully demonstrated as an efficient passivating hole-selective contact in crystalline Si (c-Si) heterojunction solar cells because of its large bandgap (∼3.2 eV) and work function (∼6.9 eV). However, the severe performance degradation coming from the instability of the MoOX and its interfaces has not been well addressed. In this work, we started with a c-Si(p)/MoOX heterojunction solar cell that yielded a power conversion efficiency (PCE) of 15.86%, in which the MoOX film was synthesized by industry-compatible atomic layer deposition (ALD). The initial PCE dropped to 10.20% after 2 days because of severe migration of O and Ag at the MoOX/Ag interface. We solved this by the insertion of a CrOX layer between the MoOX layer and the Ag electrode. The solar cell was found to be stable for more than 8 months in air because of the suppression of interface degradation. Our work demonstrates an effective way of improving the stability of silicon solar cells with transition metal oxide carrier selective contacts.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Silicon and Solar Cell Technologies · Thin-Film Transistor Technologies · Silicon Nanostructures and Photoluminescence

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

CAS Key Lab of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, 99 Haike Road, Zhangjiang Hi-Tech Park, Pudong, Shanghai 201210, China

School of Materials Science and Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, China

Jinneng Clean Energy Technology Ltd., 533 Guang’an Street, Jinzhong 030600, China

School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, 2052 Sydney, Australia

Department of Physics, College of Sciences, Shanghai University, Shanghai 200444, China

Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, P.R. China

School of Microelectronics, University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, China

Funding

Natural Science Foundation of Shanghai · National Natural Science Foundation of China

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