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太阳能电池. 太阳能电池. 太阳能电池. 太阳能电池. 低陷状态密度和长载体扩散在有机三化单晶中

Dong Shi¹, Valerio Adinolfi², Riccardo Comin²

¹Solar and Photovoltaic Engineering Research Center (SPERC), King Abdullah University of Science and Technology (KAUST), 23955-6900 Thuwal, Saudi Arabia.

Science (New York, N.Y.)

|January 31, 2015

概括

大型单晶甲基三化 (MAPbX3) 矿使用抗溶剂蒸汽辅助方法生长. 这一突破揭示了低陷密度和长载体扩散长度,推动了矿太阳能电池研究.

科学领域:

材料科学材料科学材料科学
固态物理固态物理
太阳能光伏发电是如何实现的

背景情况:

聚晶甲基三化 (MAPbX3) 矿膜表现出乱,阻碍了对其基本性质和性能限制的理解.
在MAPbX3薄膜中的障碍掩盖了对于太阳能电池等先进应用至关重要的内在材料特性.

研究的目的:

克服多晶薄膜的局限性,通过制造大型,无裂纹的MAPbX3.3单晶.
通过最大限度地减少结构失调的影响,准确地描述MAPbX3矿的光学和电荷传输特性.

主要方法:

抗溶剂蒸汽辅助结晶技术可生长相当大的单晶 (> 100 mm3).
合成的MAPbX3单晶的详细光学和电荷传输特征.
使用密度函数理论 (DFT) 计算验证实验结果.

主要成果:

实现了无裂纹的MAPbX3单晶,体积超过100立方毫米.
在MAPbX3单晶中观察到异常低的陷状态密度 (10^910^10 cm−3),与高质量的相似.
在MAPbX3单晶中测量电荷载体扩散长度大于10微米.

结论:

抗溶剂蒸汽辅助结晶方法是生产高质量的MAPbX3单晶的有效方法.
MAPbX3单晶具有内在的特性,包括低陷密度和长载体扩散长度,适用于高性能光电子设备.
这些发现为矿材料的基本限制提供了关键的见解,并为改进的矿太阳能电池铺平了道路.

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