Li Na Quan
University of California, Berkeley
60 Papers
107 Citations
Li Na Quan is an academic researcher from University of California, Berkeley. The author has contributed to research in topics: Perovskite (structure) & Quantum dot. The author has an hindex of 36, co-authored 58 publications. Previous affiliations of Li Na Quan include UPRRP College of Natural Sciences & Lawrence Berkeley National Laboratory.
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Papers
Perovskite light-emitting diodes with external quantum efficiency exceeding 20 per cent
Kebin Lin,Jun Xing,Li Na Quan,F. Pelayo García de Arquer,Xiwen Gong,Jianxun Lu,Liqiang Xie,Weijie Zhao,Di Zhang,Chuanzhong Yan,Wenqiang Li,Xinyi Liu,Yan Lu,Jeffrey Kirman,Edward H. Sargent,Qihua Xiong,Zhanhua Wei +16 more
TL;DR: In this article, the authors describe visible-light-emitting perovskite LEDs that surpass the quantum efficiency milestone of 20.3 per cent, which is achieved by a new strategy for managing the compositional distribution in the device.
Efficient and stable solution-processed planar perovskite solar cells via contact passivation.
Hairen Tan,Ankit Jain,Oleksandr Voznyy,Xinzheng Lan,F. Pelayo García de Arquer,James Z. Fan,Rafael Quintero-Bermudez,Mingjian Yuan,Bo Zhang,Yicheng Zhao,Fengjia Fan,Peicheng Li,Li Na Quan,Yongbiao Zhao,Zheng-Hong Lu,Zhenyu Yang,Sjoerd Hoogland,Edward H. Sargent +17 more
TL;DR: A contact-passivation strategy using chlorine-capped TiO2 colloidal nanocrystal film that mitigates interfacial recombination and improves interface binding in low-temperature planar solar cells is reported.
2.1K
Perovskite energy funnels for efficient light-emitting diodes
Mingjian Yuan,Li Na Quan,Li Na Quan,Riccardo Comin,Grant Walters,Randy P. Sabatini,Oleksandr Voznyy,Sjoerd Hoogland,Yongbiao Zhao,Eric M. Beauregard,Pongsakorn Kanjanaboos,Zheng-Hong Lu,Dong Ha Kim,Edward H. Sargent +13 more
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.
2.1K
Ligand-Stabilized Reduced-Dimensionality Perovskites
Li Na Quan,Li Na Quan,Mingjian Yuan,Riccardo Comin,Oleksandr Voznyy,Eric M. Beauregard,Sjoerd Hoogland,Andrei Buin,Ahmad R. Kirmani,Kui Zhao,Aram Amassian,Dong Ha Kim,Edward H. Sargent +12 more
TL;DR: Reduced-dimensionality (quasi-2D) perovskite films are reported that exhibit improved stability while retaining the high performance of conventional three-dimensionalperovskites, and are achieved by the choice of stoichiometry in materials synthesis.
Perovskite–fullerene hybrid materials suppress hysteresis in planar diodes
Jixian Xu,Andrei Buin,Alexander H. Ip,Wei Li,Oleksandr Voznyy,Riccardo Comin,Mingjian Yuan,Seokmin Jeon,Zhijun Ning,Jeffrey J. McDowell,Pongsakorn Kanjanaboos,Jon-Paul Sun,Xinzheng Lan,Li Na Quan,Dong Ha Kim,Ian G. Hill,Peter Maksymovych,Edward H. Sargent +17 more
TL;DR: The first perovskite–PCBM hybrid solid with significantly reduced hysteresis and recombination loss achieved in a single step is reported, and it is posited that PCBM, by tying up both halide-rich antisites and unincorporated halides, reduces electric field-induced anion migration that may give rise to hysteResis and unstable diode behaviour.