摘要在本论文中，我们制备了基于聚(3,4 -二氧乙基噻吩 )-聚苯乙烯磺酸（PEDOT:PSS）/硅（Si）的有机-无机杂化太阳能电池，并通过改善该杂化器件的背接触，从而提高该器件的光电转换效率。86394

我们通过低温下溶液旋涂的方法，在Si/PEDOT:PSS杂化太阳能电池的铝背电极和平面硅基底之间插入一层聚乙烯亚胺（PEI），改善了该器件的背接触。与参比器件（未插入PEI层的器件）9。11%的光电转换效率相比，插入PEI层后我们获得了10。26%的光电转换效率。通过对器件进行电流-电压特性曲线测试发现，与参比器件相比，插入PEI层后，器件的短路电流密度、填充因子和光电转换效率都有了明显的提升。通过对暗态下器件的电流密度-电压曲线拟合，发现插入PEI层后电池的反向饱和电流密度和品质因子都有所降低，证实PEI层的插入减少了器件内部的电荷复合，从而改善了器件性能。为了探究器件性能得以改善的原因，我们计算了插入PEI层前后器件的串联电阻，发现随PEI层的插入，器件的串联电阻减小，这是器件性能得以改善的原因。

毕业论文关键词：Si/PEDOT:PSS杂化太阳能电池；背接触；PEI；串联电阻；

Abstract In this paper, we fabricated solar cells based on poly (3,4 - oxygen ethyl thiophen) - polystyrene sulfonic acid (PEDOT: PSS) / silicon (Si)。 The performance of the device was improved by inserting a thin layer of PEI。

The rear contact of the device was improved by inserting a polyethylene imine (PEI) layer through solution spin coating method between Al and Si under low temperature。 Compare with the reference device (without inserting PEI layer devices) of 9。11% photoelectric conversion efficiency , we obtain the photoelectric conversion efficiency of 10。26% after insert PEI layer。 Through the test of device current - voltage characteristic, compared to the reference device, short-circuit current density, fill factor, and photoelectric conversion efficiency of the device has been noticeably improved。 By fitting the current density voltage curve of the device in dark state,It is found that the reverse saturation current density and the quality factor has decrease after insert the PEI layer , which confirm that the insertion of the PEI layer reduces the charge recombination in the device, which improves the performance of the device。In order to explore the reasons for improving the performance of the device, we calculate the series resistance of the device before and after the insertion of PEI layer, and found that the series resistance of the device decreases with the insertion of PEI layer, which is the reason for the improvement of the device performance。

Key words: Si/PEDOT:PSS hybrid solar cell; rear contact; PEI; series resistance;

目 录

第一章诸论1

1。1 引言1

1。2 太阳能电池的基础2

  1。2。1固体能带理论-2

  1。2。2太阳能电池的工作原理-3

  1。2。3太阳能电池的特性参数-4

1。3 基于Si/PEDOT:PSS杂化太阳能电池的介绍5

  1。3。1太阳能电池的种类-5

  1。3。2基于Si/PEDOT:PSS杂化太阳能电池的工作机理和结构表征7

  1。3。3对于Si/PEDOT:PSS杂化太阳能电池的优化7

1。4本文的主要内容 9

第二章 PEI层的插入对Si/PEDOT:PSS杂化太阳能电池的影响-11

2。1 引言11

2。2 实验内容11

  2。2。1实验试剂-12

  2。2。2实验仪器-12

  2。2。3实验过程-12

2。3 实验结果与讨论14

    2。3。1器件结构-14

2。3。2PEI层的插入对电池性能的影响14

2。4 小结18

第三章 结语-20

致谢21