单色光电流-电压特性测试在碲化镉太阳电池研究中应用
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摘要
针对不同结构的碲化镉(CdTe)太阳电池,测试其单色光特性,并计算出不同波长下的收集效率。结果表明,高质量的高阻层能提高太阳电池短波区的收集效率,对提高长波段的收集效率有一定作用;背接触层能够明显在电池背部形成欧姆接触;适当的硫化镉(CdS)层的厚度能够改善窗口层的界面,提升电池的器件性能。通过该测试方法可以获得器件结构与器件性能之间关系,从而为进一步优化电池结构和制备工艺、提高太阳电池转换效率提供依据。
The monochromatic optical current-voltage characteristic performances of cadmium telluride solar cells with different structures were tested,and the collection efficiency at different wavelengths was calculated. The results show that high resistivity layer can greatly improve the collection efficiency of solar cell short-wave,and has a certain effect on the collection efficiency of long-wave. The back contact layer facilitates forming ohmic contact on the back of the solar cells. And the appropriate cadmium sulfide layer can improve the interface of window layer and improve the device performance of solar cells. The relationship between device structure and device performance is obtained by the measure method in order to provide theoretical and experimental basis for further optimization of battery structure and preparation technology and improvement of solar cell conversion efficiency.
The monochromatic optical current-voltage characteristic performances of cadmium telluride solar cells with different structures were tested,and the collection efficiency at different wavelengths was calculated. The results show that high resistivity layer can greatly improve the collection efficiency of solar cell short-wave,and has a certain effect on the collection efficiency of long-wave. The back contact layer facilitates forming ohmic contact on the back of the solar cells. And the appropriate cadmium sulfide layer can improve the interface of window layer and improve the device performance of solar cells. The relationship between device structure and device performance is obtained by the measure method in order to provide theoretical and experimental basis for further optimization of battery structure and preparation technology and improvement of solar cell conversion efficiency.
引文
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[2] RuehleKarola Juhl,Mattias K,Abbott Malcolm D,et al,Evaluating crystalline silicon solar cells at low intensities using intensitydependent analysis of I-U parameters[J]. IEEE J Photov,2015,5(3):926-931.
[3] Koster L J A,Mihailetchi V D,Xie H,et al. Origin of the light intensity dependence of the short-circuit current of polymer/fullerene solar cells[J]. Appl Phys Lett, 2015, 87(20):2035021-20350214.
[4] Cojocaru L,Uchida S,Jayaweera Piyankarage V V,et al. Origin of the hysteresis in I-U curves for planar structure perovskite solar cells rationalized with a surface boundary-induced capacitance model[J].Chem Lett,2015,44(12):1750-1752.
[5] Hegedus S S, Shafarman W N, Thinfilm solar cells:device measurements and analysis[J]. Progress in Photovoltaics Research&Applications,2004,12(12):155-176.
[6] Fahrenbruch A L. The relationship of CdS/CdTe cell band profiles to J-V characteristics and bias-dependent quantum efficiency[C]//2006 IEEE 4th World Conference on Photovoltaic Energy Conversion,WCPEC-4,Waikoloa,HI,United states,Inst of Elec and Elec Eng Computer Society:Waikoloa,HI,United States,2007:376-379.
[7] Takagi Katsuhiko, Magaino Shinichi, Saito Hidenori, et al.Measurement and evaluation of dye-sensitized solar cell performance[J]. J Photochem Photobiol C:Photochem. Reviews,2013,14:1-12.
[8] Wang Z,Cheng Z,Delahoy,A E,et al. A study of light-sensitive ideality factor and voltage-dependent carrier collection of CdTe solar cells in forward bias[J]. IEEE Journal of Photovoltaics,2013,3(2):843-851.
[9] Scheer R,Schock H,Chalcogenide photovoltaics[M]. NY:WileyVCH:2011.
[10] Cao S,WU L L,Feng L H,et al. Effect of substrate temperature on CdTe thin film property and solar cell performance[J]. Journal of Inorganic Materials,2016,31:141-147.
[11] Gu H,Ren A,J. Zhang K,et al. The study of oxygen concentration in the CdTe thin film prepared by vapor transport deposition for CdTe photovoltaic devices[J]. Journal of Materials Science:Materials in Electronics,2017,28:9442-9449.
[12]蒋亚男.碲化镉薄膜太阳电池的AQE和收集效率研究[D].成都:四川大学,2017.
[13]曹胜.碲化镉多晶薄膜的蒸汽输运沉积及器件研究[D].成都:四川大学,2016.
[14] Mondal A, Mccandless B E, Birkmire R W. Electrochemical deposition of thin Zn Te films as a contact for CdTe solar cells[J].Solar Energy Materials&Solar Cells,1992,26(3):181-187.
[15] Mccandless B E,Engelmann M G,Birkmire R W. Interdiffusion of CdS/CdTe thin films:Modeling x-ray diffraction line profiles[J].Journal of Applied Physics,2001,89(2):988-994.
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