4 January 2008 Study of stability for a-Si:H thin-film solar cells on polyimide substrates
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Abstract
Hydrogenated amorphous silicon thin film solar cells are prepared using radio frequency plasma enhanced chemical vapor deposition on polyimide substrates. The structure of the cell is polyimide /Al/n-μc-Si:H/i-a-Si:H/p-a-SiC:H/TCO. Due to amorphous silicon cells have Staebler-Wronski effect and their efficiencies do not stabilize at prepared, so these cells were placed more than fifteen months and I-V characteristics of these cells were measured in four times. They include (i)in the initial, (ii) placed in desiccator over fifteen months, (iii) light-soaked for five hours under AM 1.5 (100mW/cm2) and (iv) annealed for two hours in natural conditions. The measurement results such as open-circuit voltage, short-circuit current, resistance in series, parallel resistance, conversion efficiency and fill factor are given and studied. Staebler-Wronski Effect are found and explained with these parameters. Generally, after light-soaking, the short-circuit currents of cells increase, the fill factors and open-circuit voltage decrease and the reduction of the efficiency is proportional to the fill factor. Abnormal Staebler-Wronski Effect appears in a cell. The cause of these phenomena is analyzed. The consequence that the efficiency varieties with the fill factor is derived r. A graded gap in P-I interface can be improved the cell efficiently. Ultimately, the stability of a-SiH thin film solar cells on polyimide substrate is discussed.
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Liying Han, Dexian Zhang, Ke Tao, Qiang Xi, Hongkun Cai, Cunshan Zhang, Hongdong Zhao, "Study of stability for a-Si:H thin-film solar cells on polyimide substrates", Proc. SPIE 6841, Solid State Lighting and Solar Energy Technologies, 68411D (4 January 2008); doi: 10.1117/12.756117; https://doi.org/10.1117/12.756117
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