Spectral Downshifting and Passivation Effects Using 2D Perovskite (OAm)2SnBr4 Films to Enhance the Properties of Si Nanowire Solar Cells
Spectral Downshifting and Passivation Effects Using 2D Perovskite (OAm)2SnBr4 Films to Enhance the Properties of Si Nanowire Solar Cells
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DOI：
10.1021/acsaem.3c00064
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发表时间：
2023-04
影响因子：
6.4
通讯作者：
Mostafa F. Abdelbar;Qinqiang Zhang;Mohammed Abdelhameed;A. El-Amir;W. Jevasuwan;M. El-Kemary;N. Fukata-N.-Fuk
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文献类型：
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作者：
Mostafa F. Abdelbar;Qinqiang Zhang;Mohammed Abdelhameed;A. El-Amir;W. Jevasuwan;M. El-Kemary;N. Fukata-N.-Fuk
硅纳米线（Si NWs）由于其显著的光捕获特性而成为光伏发电的一个有前途的候选者。然而，Si NWs具有高密度的表面陷阱，导致载流子复合；此外，由于高能光子的吸收而产生的热化导致了输入太阳能的耗散。在本研究中，在Si NWs的基础上制备了Ag/Ti/n+/p-Si NWs/MoOx/Ag太阳能电池，MoOxas为空穴传输层。高发光的二维钙钛矿（C18H35NH3） 2snbr4应用于电池的前表面。这种带有环氧胺（OAm）间隔剂的二维钙钛矿钝化了Si NWs的表面。除了钝化作用外，2D钙钛矿（OAm） 2snbr4还产生了降移和能量传递效应，减少了热损失，提高了转换效率。这种效应在半导体量子点中经常被观察到，在二维钙钛矿薄膜中也很明显，导致djsc、Voc和填充因子的改善，并将整体电池效率提高到18%。
Si nanowires (Si NWs) are emerging as a promising candidate for photovoltaics due to their significant light-trapping characteristics. However, Si NWs have a high density of surface traps, which lead to carrier recombination; also, thermalization due to the absorption of high-energy photons causes the dissipation of input solar energy. In this study, Ag/Ti/n+/p-Si NWs/MoOx/Ag solar cells were formed based on Si NWs with MoOxas a hole transport layer. A highly luminescent 2D perovskite (C18H35NH3)2SnBr4was applied to the front surface of the cell. This 2D perovskite with oleylamine (OAm) spacer passivates the surface of the Si NWs. In addition to the passivation effect, the 2D perovskite (OAm)2SnBr4causes a downshifting and energy-transfer effect, which reduces the heat loss and raises the conversion efficiency. This effect has often been observed in semiconductor quantum dots and is also evident in 2D perovskite films, resulting in improvedJsc,Voc, and fill factor and an increase in the overall cell efficiency to 18%.