Journal
ADVANCED MATERIALS
Volume 34, Issue 6, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202107111
Keywords
crytallization; device stability; passivation; perovskite solar cells; resonance hole-transporting materials
Categories
Funding
- National Natural Science Foundation of China [61604079, 61705111, 61704091, 61875090, 21674049, 91833306, 21672193]
- National Key Research and Development Program of China [2017YFB0404501]
- Initiative Postdocs Supporting Program [BX201600076]
- Open Project Program of Wuhan National Laboratory for Optoelectronics [2020WNLOKF012]
- fifth 333 project of Jiangsu Province [BRA2019080]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) [YX030003]
- Natural Science Foundation of Jiangsu Province of China [BK20160891]
- Six Talent Plan of Jiangsu Province [2016XCL050]
- 1311 Talents Program of Nanjing University of Posts and Telecommunications (Dingshan)
- Open Project Program of Key laboratory of interface science and engineering in advanced materials, Taiyuan University of Technology - NUPTSF [KLISEAM201902, NY220219]
- Ministry of Industry and Information Technology of the People's Republic of China [Z135060009002]
- Zhengzhou University
- Supercomputing Laboratory at King Abdullah University of Science and Technology (KAUST)
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Manipulating perovskite crystallization to prepare high-quality perovskite films is essential for achieving efficient and stable perovskite solar cells. By using a resonance hole-transporting material to modulate perovskite crystallization, high-performance inverted PSCs with power conversion efficiencies approaching 22% for small-area devices and up to 19.5% for large-area devices were produced, showing remarkably high stability without encapsulation.
Manipulating perovskite crystallization to prepare high-quality perovskite films is the key to achieving highly efficient and stable perovskite solar cells (PSCs). Here, a dynamic strategy is proposed to modulate perovskite crystallization using a resonance hole-transporting material (HTM) capable of fast self-adaptive tautomerization between multiple electronic states with neutral and charged resonance forms for mediating perovskite crystal growth and defect passivation in situ. This approach, based on resonance variation with self-adaptive molecular interactions between the HTM and the perovskite, produces high-quality perovskite films with smooth surface, oriented crystallization, and low charge recombination, leading to high-performance inverted PSCs with power conversion efficiencies approaching 22% for small-area devices (0.09 cm(2)) and up to 19.5% for large-area devices (1.02 cm(2)). Also, remarkably high stability of the PSCs is observed, retaining over 90%, 88%, or 83% of the initial efficiencies in air with relative humidity of 40-50%, under continuous one-sun illumination, or at 75 degrees C annealing for 1000 h without encapsulation.
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