In Situ Growth of 2D Perovskite Capping Layer for Stable and Efficient Perovskite Solar Cells
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TLDR
In this paper, a 2D-3D perovskite stacking-layered architecture was designed by in situ growing 2D PEA(2)PbI(4) capping layers on top of 3D PbI film, which drastically improved the stability of PSCs without compromising their high performance.Abstract:
2D halide perovskites have recently been recognized as a promising avenue in perovskite solar cells (PSCs) in terms of encouraging stability and defect passivation effect. However, the efficiency (less than 15%) of ultrastable 2D Ruddlesden-Popper PSCs still lag far behind their traditional 3D perovskite counterparts. Here, a rationally designed 2D-3D perovskite stacking-layered architecture by in situ growing 2D PEA(2)PbI(4) capping layers on top of 3D perovskite film, which drastically improves the stability of PSCs without compromising their high performance, is reported. Such a 2D perovskite capping layer induces larger Fermi-level splitting in the 2D-3D perovskite film under light illumination, resulting in an enhanced open-circuit voltage (V-oc) and thus a higher efficiency of 18.51% in the 2D-3D PSCs. Time-resolved photoluminescence decay measurements indicate the facilitated hole extraction in the 2D-3D stacking-layered perovskite films, which is ascribed to the optimized energy band alignment and reduced nonradiative recombination at the subgap states. Benefiting from the high moisture resistivity as well as suppressed ion migration of the 2D perovskite, the 2D-3D PSCs show significantly improved long-term stability, retaining nearly 90% of the initial power conversion efficiency after 1000 h exposure in the ambient conditions with a high relative humidity level of 60 +/- 10%.read more
Citations
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Journal ArticleDOI
Surface passivation of perovskite film for efficient solar cells
Qi Jiang,Yang Zhao,Xingwang Zhang,Xiaolei Yang,Yong Chen,Zema Chu,Qiufeng Ye,Li Xingxing,Zhigang Yin,Jingbi You +9 more
TL;DR: In this paper, an organic halide salt phenethylammonium iodide (PEAI) was used on HC(NH2)2-CH3NH3 mixed perovskite films for surface defect passivation.
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An interface stabilized perovskite solar cell with high stabilized efficiency and low voltage loss
Jason J. Yoo,Sarah Wieghold,Melany Sponseller,Matthew R. Chua,Sophie N. Bertram,Noor Titan Putri Hartono,Jason S. Tresback,E. V. Hansen,Juan-Pablo Correa-Baena,Vladimir Bulovic,Tonio Buonassisi,Seong Sik Shin,Moungi G. Bawendi +12 more
TL;DR: In this article, the hidden role of isopropyl alcohol (IPA) in surface treatments is demonstrated and a strategy in which the passivating agent is deposited without destabilizing the high quality perovskite underlayer.
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Perovskite precursor solution chemistry: from fundamentals to photovoltaic applications.
TL;DR: The fundamental background knowledge of nucleation and crystal growth processes in solution including the LaMer model and Ostwald ripening process is described and the contemporary progress in chemical precursor composition is provided to comprehend the current research approaches to further enhance photovoltaic performance and device stability.
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Additive Engineering for Efficient and Stable Perovskite Solar Cells
Fei Zhang,Kai Zhu +1 more
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Causes and Solutions of Recombination in Perovskite Solar Cells
Jiangzhao Chen,Nam-Gyu Park +1 more
TL;DR: The focus herein is on the recombination at perovskite/electron-transporting material and perovSkite/hole-transport material interfaces in normal or inverted PSCs.
References
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High-efficiency two-dimensional Ruddlesden–Popper perovskite solar cells
Hsinhan Tsai,Hsinhan Tsai,Wanyi Nie,Jean-Christophe Blancon,Constantinos C. Stoumpos,Reza Asadpour,Boris Harutyunyan,Amanda Neukirch,Rafael Verduzco,Jared Crochet,Sergei Tretiak,Laurent Pedesseau,Jacky Even,Muhammad A. Alam,Gautam Gupta,Jun Lou,Pulickel M. Ajayan,Michael J. Bedzyk,Mercouri G. Kanatzidis,Aditya D. Mohite +19 more
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Perovskite energy funnels for efficient light-emitting diodes
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TL;DR: A perovskite mixed material comprising a series of differently quantum-size-tuned grains that funnels photoexcitations to the lowest-bandgap light-emitter in the mixture functions as charge carrier concentrators, ensuring that radiative recombination successfully outcompetes trapping and hence non-radiatives recombination.
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