Duan Leiping, Uddin Ashraf
School of Photovoltaic and Renewable Energy Engineering University of New South Wales Sydney NSW 2052 Australia.
Adv Sci (Weinh). 2020 Apr 22;7(11):1903259. doi: 10.1002/advs.201903259. eCollection 2020 Jun.
The organic solar cell (OSC) is a promising emerging low-cost thin film photovoltaics technology. The power conversion efficiency (PCE) of OSCs has overpassed 16% for single junction and 17% for organic-organic tandem solar cells with the development of low bandgap organic materials synthesis and device processing technology. The main barrier of commercial use of OSCs is the poor stability of devices. Herein, the factors limiting the stability of OSCs are summarized. The limiting stability factors are oxygen, water, irradiation, heating, metastable morphology, diffusion of electrodes and buffer layers materials, and mechanical stress. The recent progress in strategies to increase the stability of OSCs is surveyed, such as material design, device engineering of active layers, employing inverted geometry, optimizing buffer layers, using stable electrodes and encapsulation materials. The International Summit on Organic Photovoltaic Stability guidelines are also discussed. The potential research strategies to achieve the required device stability and efficiency are highlighted, rendering possible pathways to facilitate the viable commercialization of OSCs.
有机太阳能电池（OSC）是一种很有前景的新兴低成本薄膜光伏技术。随着低带隙有机材料合成和器件加工技术的发展，单结有机太阳能电池的功率转换效率（PCE）已超过16%，有机-有机串联太阳能电池的功率转换效率已超过17%。有机太阳能电池商业应用的主要障碍是器件稳定性差。在此，总结了限制有机太阳能电池稳定性的因素。限制稳定性的因素包括氧气、水、辐照、加热、亚稳态形态、电极和缓冲层材料的扩散以及机械应力。综述了提高有机太阳能电池稳定性策略的最新进展，如材料设计、活性层器件工程、采用倒置结构、优化缓冲层、使用稳定电极和封装材料。还讨论了有机光伏稳定性国际峰会指南。强调了实现所需器件稳定性和效率的潜在研究策略，为促进有机太阳能电池的可行商业化提供了可能途径。
