Analyzing the efficiency, stability and cost potential for fullerene-free organic photovoltaics in one figure of merit
Analyzing the efficiency, stability and cost potential for fullerene-free organic photovoltaics in one figure of merit
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DOI：
10.1039/c8ee00151k
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发表时间：
2018-06-01
影响因子：
32.5
通讯作者：
Brabec, Christoph J.
中科院分区：
文献类型：
--
作者：
Li, Ning;McCulloch, Iain;Brabec, Christoph J.
溶液处理有机光伏（OPV）器件的功率转换效率（PCE）继续朝着15%的里程碑增长。最近出现的非富勒烯受体（NFA）大大加速了这一发展。以前进行的效率分析大多是基于富勒烯受体，而不考虑其对光吸收和PCE的增强的贡献。此外，通常不讨论OPV器件的稳定性和成本潜力，这有时使得效率预测不太能代表广泛的兴趣。在这项工作中，我们有效地结合联合收割机的预测效率与实验确定的稳定性数据，分析和预测的商业潜力的NFA为基础的OPV产品。假设NFA在近红外吸收处占主导地位，OPV器件的效率极限预计接近20%，并且发现对施主带隙不敏感。由于最先进的基于NFA的OPV器件具有优异的光稳定性，因此建议将具有有前途的加工性能、优异的环境稳定性和低合成复杂性的相应定制供体设计为用于大规模生产和商业化的现实材料对。
The power conversion efficiencies (PCEs) of solution-processed organic photovoltaic (OPV) devices continue increasing towards the 15% milestone. Recently-emerging non-fullerene acceptors (NFAs) have significantly accelerated this development. Most of the efficiency analyses performed previously are based on a fullerene acceptor without considering its contribution to the enhancement of photo-absorption and PCE. Moreover, the stability and cost potential of OPV devices are usually not discussed, which sometimes makes the efficiency prediction less representative for broad interest. In this work, we effectively combine the prediction of efficiencies with experimentally determined stability data to analyze and predict the commercial potential of a NFA-based OPV product. Assuming that NFAs dominate the blend near IR absorption, the efficiency limit of OPV devices is predicted to be close to 20% and is found to be insensitive to the donor bandgap. With the excellent photo-stability observed for state-of-the-art NFA-based OPV devices, it is suggested that the corresponding customized donors with promising processing properties, excellent environmental stability and low synthesis complexity be designed as realistic material pairs for large-scale production and commercialization.