Realization of 13.6% Efficiency on 20 μm-thick c-Si/PEDOT:PSS Hybrid Heterojunction Solar Cells via Advanced Nanotexturing and Surface Recombination Suppression
Hybrid silicon/polymer solar cells promise to be an economically feasible alternative energy solution for various applications if ultra-thin flexible crystalline silicon (c-Si) substrates are used.However, utilization of ultra-thin c-Si encounters problems in light-harvesting and electronic losses at surfaces, which degrade the performance of solar cells.Here, we developed a unique metal-assisted chemical etching method to deliver front-side surface texturing of hierarchically bowl-like nanopores on a 20 μm-thick c-Si, enabling an excellent light absorption over the entire solar spectrum as well as an enlarged contact area with the polymer.In addition, a back surface field (BSF) was introduced on the backside of the thin c-Si to minimize the series resistance losses as well as to suppress the surface recombination by the built high-low junction.Through these improvements, a power conversion efficiency (PCE) up to 13.6% was achieved under air mass 1.5G irradiation for silicon/organic hybrid solar cells with the c-Si thickness of about 20 μm.This PCE is as high as the record currently reported in hybrid cells constructed from bulk c-Si, suggesting a design rule for efficient silicon/organic solar cells with thinner absorbers.
hybrid solar cell heterojunction surface nanotexturing charge recombination light trapping
Jian He Pingqi Gao Mingdun Liao Xi Yang Zhiqin Ying Suqiong Zhou Yi Cui Jichun Ye
Ningbo Institute of Material Technology and Engineering,Chinese Academy of Sciences,Ningbo,315201,Pe Department of Material Science and Engineering,Stanford University,Stanford,California 94305,United
国内会议
广州
英文
113-124
2015-05-01（万方平台首次上网日期，不代表论文的发表时间）