Solution‐processed ZnO as the efficient passivation and electron selective layer of silicon solar cells,Progress in Photovoltaics

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Solution‐processed ZnO as the efficient passivation and electron selective layer of silicon solar cells
Progress in Photovoltaics ( IF 8.0 ) Pub Date : 2018-07-13 , DOI: 10.1002/pip.3044
Jiangnan Ding ₁ , Yurong Zhou ₁ , Gangqiang Dong ₁ , Ming Liu _{1,

2} , Donghong Yu _{3,

4} , Fengzhen Liu _{1,

2}

Affiliation

Solution‐processed intrinsic ZnO and Al‐doped ZnO (ZnO:Al) were spin coated on textured n‐type c‐Si wafer to replace the phosphorus‐doped amorphous silicon as the electron selective transport layer (ESTL) of the Si heterojunction (SHJ) solar cells. Besides the function of electron selective transportation, the nondoped ZnO was found to possess certain passivation effect on c‐Si wafer. The SHJ solar cells with different combinations of passivation layer (intrinsic a‐Si:H, SiO_x, and nondoped ZnO) and electron transport layer (nondoped ZnO and ZnO:Al) were fabricated and compared. An efficiency up to 18.46% was achieved on a SHJ solar cell with an a‐Si:H/ZnO:Al double layer back structure. And, all the solution‐processed nondoped ZnO/ZnO:Al combination layers present fairly good electron selective transportation property for SHJ solar cell, resulting in an efficiency of 17.13%. The carrier transport based on energy band diagrams of the rear side of the solar cells has been discussed related to the performance of the SHJ solar cells.

中文翻译：

固溶处理的ZnO作为硅太阳能电池的有效钝化层和电子选择性层

将溶液处理的本征ZnO和Al掺杂的ZnO（ZnO：Al）旋涂在纹理化的n型c-Si晶片上，以代替磷掺杂的非晶硅作为Si异质结（SHJ）的电子选择性传输层（ESTL））太阳能电池。除了电子选择性传输的功能外，未掺杂的ZnO还对c-Si晶片具有一定的钝化作用。具有不同钝化层组合的SHJ太阳能电池（本征a-Si：H，SiO _x，并制作并比较了未掺杂的ZnO和电子传输层（未掺杂的ZnO和ZnO：Al）。具有a-Si：H / ZnO：Al双层背面结构的SHJ太阳能电池的效率高达18.46％。而且，所有溶液处理的非掺杂ZnO / ZnO：Al组合层都对SHJ太阳能电池表现出相当好的电子选择性传输性能，效率为17.13％。已经讨论了基于太阳能电池背面的能带图的载流子传输，涉及到SHJ太阳能电池的性能。

更新日期：2018-07-13

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