期刊
ADVANCED SCIENCE
卷 7, 期 5, 页码 -出版社
WILEY
DOI: 10.1002/advs.201903009
关键词
intermediate-state; perovskite solar cells; process tolerance; textured film
资金
- National Natural Science Foundation of China [51572037]
- Key Research and Development Project of Jiangsu Province [BE2017006-3]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
As the power conversion efficiency (PCE) of perovskite solar cells (PSCs) is increased to as high over 25%, it becomes pre-eminent to study a scalable process with wide processing window to fabricate large-area uniform perovskite films with good light-trapping performance. A stable and uniform intermediate-state complex film is obtained by using tetramethylene sulfoxide (TMSO), which extends the annealing window to as long as 20 min, promotes the formation of a high-quality perovskite film with larger grains (over 400 nm) and spontaneously forms the surface texture to result in an improved fill factor and open-circuit voltage (V-oc). Moreover, the superior surface texture significantly increases the long-wavelength response, leading to an improved short-circuit current density (J(sc)). As a result, the maximum PCE of 21.14% is achieved based on a simple planar cell structure without any interface passivation. Moreover, a large area module with active area of 6.75 cm(2) is assembled using the optimized TMSO process, showing efficiency as high as 16.57%. The study paves the way to the rational design of highly efficient PSCs for potential scaled-up production.
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