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9.73%效率非富勒烯所有有机小分子太阳能电池与吸收-补充供应器和接受器

Haijun Bin^1,2, Yankang Yang^1,2, Zhi-Guo Zhang¹

¹Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China.

Journal of the American Chemical Society

|March 22, 2017

概括

研究人员开发了新的有机小分子太阳能电池, 实现了9.73%的功率转换效率. 这种非富勒烯有机太阳能电池 (OSC) 的进步利用了新的捐赠材料以提高性能.

科学领域:

材料科学
有机电子
太阳能发电

背景情况:

用n型有机半导体 (n-OS) 作为接受器的聚合物太阳能电池 (PSC) 已经迅速发展.
使用小分子供体和n-OS受体的非富勒烯有机太阳能电池 (OSC) 在研究进展方面落后.

研究的目的:

合成和评估非富勒烯OSC的新型D-A结构带隙有机小分子供体 (H11).
研究硫联侧链对p型有机半导体 (p-OSs) 的光伏性能的影响.

主要方法:

合成H11 (双乙烯-二甲供体,二甲受体) 和对照分子H12.
使用H11作为捐赠体和IDIC作为接受体的所有小分子OSC的制造和表征.
使用汉森溶解度参数和差分扫描热量计等技术分析材料性能,包括吸收,能量水平,移动性和薄膜形态.

主要成果:

在所有小分子OSC与H11捐赠器和IDIC接受器中实现了9.73%的功率转换效率 (PCE).
与H12相比,H11表现出强烈的吸收,低的HOMO能量水平,更高的孔移动性和有序的双模晶体包装.
H11混合物显示了更大的相互作用参数 (χ).

结论:

基于二的2D结合p-OS是非富勒伦OSC的有前途的中等带隙供体.
提奥芬结合的侧链显著提高了p-OS的光伏性能.
开发的H11供体材料有助于在非富勒烯所有小分子OSC中实现最先进的PCE.

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P-N junction

P-N junction

A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...