Analysis of Back-Contact Interface Recombination in Thin-Film Solar Cells

作者：Paul Sanjoy; Grover Sachit; Repins Ingrid L; Keyes Brian M; Contreras Miguel A; Ramanathan Kannan; Noufi Rommel; Zhao Zhibo; Liao Feng; Li Jian V^*

来源：IEEE Journal of Photovoltaics, 2018, 8(3): 871-878.

DOI：10.1109/JPHOTOV.2018.2819664

• Back-contact
• interface
• open-circuit voltage
• photovoltaics
• recombination
• SCAPS-1D

The open-circuit voltage (V-OC) in a generic TCO/buffer/absorber/back-contact thin-film solar cell device is a key parameter in the recombination analysis. In particular, V-OC is sensitively influenced by the interface recombination at the buffer/absorber front interface and at the absorber/back-contact interface. This paper reports the temperature, excitation light intensity, and wavelength-dependent open-circuit voltage analysis to separate and quantify recombination rates in solar cells at the front and back interfaces, in the depletion regions, and in the quasi-neutral region. The wavelength-dependent V-OC analysis is exploited to extract the absorber/back-contact recombination coefficient. The experimentally observed results are verified using SCAPS-1D (one dimensional-a solar cell capacitance simulator) simulation.

• 出版日期2018-5