Spontaneously spreading film process to improve the photovoltaic performance of organic solar cells with PHJ structure.
作者信息
Cheng Yetai, Wang Xiaodong, Pei Zengliang, Chen Ya-Nan, Lu Hao, Liu Yahui, Bo Zhishan
机构信息
College of Textiles & Clothing, State Key Laboratory of Bio-fibers and Eco-textiles, Qingdao University, Qingdao 266071, China.
Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China.
出版信息
Chem Commun (Camb). 2023 Nov 30;59(96):14273-14276. doi: 10.1039/d3cc04568d.
Efficient charge transport and extraction within the active layer plays a major role in the photovoltaic performance of organic solar cells (OSCs). In this work, the spontaneously spreading (SS) process was utilized to achieve sequential deposition of the active layer with a planar heterojunction (PHJ) structure. The SS process avoids the damage of the upper layer solution to the lower layer film by the spin coating process. The film with PHJ structure exhibits notable vertical phase separation compared to the bulk heterojunction (BHJ). Moreover, the power conversion efficiency (PCE) of the PHJ device (12.00%) is significantly higher than that of the BHJ (10.84%) due to the efficient charge transport. This work offers a novel fabrication method and device structure to enhance the photovoltaic performance of OSCs.
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