共查询到20条相似文献,搜索用时 203 毫秒
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采用第一性原理和电子连续方程方法,研究了p层厚度和In的掺杂浓度对单结In_xGa_(1-x)N太阳电池性能的影响。计算结果表明:p层厚度从0.05μm增加到0.07μm,In0.1Ga0.9N电池的转换效率缓慢增大;当p层厚度从0.07μm逐渐增大到0.25μm时,太阳电池的转换效率逐渐减小。当In掺杂浓度在0.5~0.7范围内逐渐增大时,短路电流密度逐渐增大,开路电压逐渐减小。当In的掺杂浓度为0.63时,转换效率达到最大,为19.80%,填充因子为0.82。因此,通过调节p层厚度和改变In掺杂浓度的方法可以提高单结InxGa1-xN太阳电池的光电特性。 相似文献
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采用限定变量的方法,运用AFORS-HET(Automat FOR Simulation of HETerostructures)软件计算模拟了不同厚度、掺杂浓度和禁带宽度的非晶硅薄膜背场以及不同厚度、禁带宽度的非晶硅本征层对a-Si(p)/c-Si(n)异质结太阳电池的影响.结果表明,在其它参数不变的情况下,增加较薄的背场和中间本征层,可以提高太阳电池的整体性能,其光电转换有很大程度提高,其最高转换效率可达20.75%;其中,中间本征层在厚度不超过20 nm时,对电池的短路电流影响不大,而其它性能则相对下降;当非晶硅薄膜背场的掺杂浓度为1019 cm-3以上,带隙为1.7 eV,厚度为5 nm时,电池性能最佳. 相似文献
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Hong Yang He Wang Xiandao Lei Chuanke Chen Dingyue Cao 《International Journal of Numerical Modelling》2014,27(4):649-655
According to the potential barriers generated by the silver, glass layer, and N+ emitter, an analytical model is developed to explain interface contact performance between the printed thick‐film silver paste and emitter for crystalline silicon solar cells. According to the model, the front contact resistance between the sintered silver and N+ emitter is simulated at different doping concentrations, temperatures, and density of state. The quantitative expression of interface contact resistance between the printed thick‐film silver paste and N+ emitter is derived for the first time. The results in this study unify different viewpoints about the current transport mechanisms at the sintered silver–silicon interface. If the glass frit chemistry and silver particle size are carefully tailored, the silver consumption per watt can be reduced, and the efficiency of crystalline silicon solar cells can be further improved. The results lay the foundation for studying the screen‐printed crystalline silicon solar cell front contact metallization system. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
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Jinkuk Kim Jejun Park Ji Hwa Hong Sung Jin Choi Gi Hwan Kang Gwon Jong Yu Nam Soo Kim Hee-eun Song 《Journal of Electroceramics》2013,30(1-2):41-45
Anti-reflection coating (ARC) film effectively reduces the reflection of sunlight on the silicon wafer surface and then increases substantially the solar cell conversion efficiency. In this work, we carried out experiments to lessen the reflectance and thus improve the conversion efficiency with double AR coating layer with silicon nitride and silicon oxide by plasma enhanced chemical vapor deposition (PECVD) for the silicon solar cells. The optimized thicknesses and refractive indices of each ARC layer were calculated with Essential Macleod program and the theoretical method. The single antireflection layer of silicon nitride was applied with 800 Å thickness and its cell showed the conversion efficiency as 17.45 %. For the double layer AR coating (DLARC), silicon nitride layer was deposited first using SiH4 and NH3, and then, silicon oxide was deposited with SiH4 and N2O. The thicknesses of SiNx and SiO2 were 800 Å and 1400 Å for DLARC-1 and 500 Å and 1000 Å for DLARC-2, respectively. As a result, the reflectance of DLARCs was lower than single SiNx and then yielded increase of short-circuit current and conversion efficiency. The completed solar cell with DLARCs showed conversion efficiencies of 17.57 % for DLARC-1 and 17.76 % for DLARC-2. This indicates that the double AR coating layer is effective to obtain the high efficiency solar cell with PECVD. 相似文献
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为了研究如何提高有机太阳能电池的光捕获并提高光电转化效率,基于LiF修饰Al电极能提高电池填充因子和稳定开路电压的结论,建立了NaF修饰Glass/ITO/PEDOT:PSS/MDMO-PPV:PCBM/Al有机太阳电池的层间光强分布理论模型。根据多层薄膜结构的有机太阳能电池的材料及光学特性,采用绒化入射面的方法引入朗伯漫反射,并结合对倏逝波模式下有机太阳能电池光捕获率的探讨,通过数值计算研究了NaF修饰层对光场分布的影响,提高了模型的光捕获并得出了有机太阳能电池捕获可见太阳光能最大值时各层厚参数Glass(1mm)/ITO(120nm)/PEDOT:PSS(20nm)/MDMO-PPV:PCBM(120nm)/NaF(1nm)/Al (110nm)和电池的短路电流为2.76mA/cm2这些结论。 相似文献