Y
Yongbiao Zhao
Researcher at University of Toronto
Publications - 78
Citations - 8968
Yongbiao Zhao is an academic researcher from University of Toronto. The author has contributed to research in topics: OLED & Quantum efficiency. The author has an hindex of 37, co-authored 76 publications receiving 7110 citations. Previous affiliations of Yongbiao Zhao include Yunnan University & Nanyang Technological University.
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Journal ArticleDOI
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.
Journal ArticleDOI
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.
Journal ArticleDOI
Highly Efficient Perovskite-Quantum-Dot Light-Emitting Diodes by Surface Engineering
Jun Pan,Li Na Quan,Li Na Quan,Yongbiao Zhao,Wei Peng,Banavoth Murali,Smritakshi P. Sarmah,Mingjian Yuan,Lutfan Sinatra,Noktan M. Alyami,Jiakai Liu,Emre Yassitepe,Zhenyu Yang,Oleksandr Voznyy,Riccardo Comin,Mohamed N. Hedhili,Omar F. Mohammed,Zheng-Hong Lu,Dong Ha Kim,Edward H. Sargent,Osman M. Bakr +20 more
TL;DR: A two-step ligand-exchange strategy is developed, in which the long-carbon- chain ligands on all-inorganic perovskite quantum dots (QDs) are replaced with halide-ion-pair ligands.
Journal ArticleDOI
Color-stable highly luminescent sky-blue perovskite light-emitting diodes
Jun Xing,Yongbiao Zhao,Mikhail Askerka,Li Na Quan,Xiwen Gong,Weijie Zhao,Jiaxin Zhao,Hairen Tan,Guankui Long,Liang Gao,Liang Gao,Zhenyu Yang,Oleksandr Voznyy,Jiang Tang,Zheng-Hong Lu,Qihua Xiong,Qihua Xiong,Edward H. Sargent +17 more
TL;DR: Perovskite light-emitting diodes show promising color tunability and device performance but suffer from emission color shift at higher driving voltages, so color stable sky-blue PeLEDs achieved by enhancing the phase monodispersity of quasi-2D perovskites thin films are reported.
Journal ArticleDOI
Tailoring the Energy Landscape in Quasi-2D Halide Perovskites Enables Efficient Green-Light Emission
Li Na Quan,Li Na Quan,Yongbiao Zhao,F. Pelayo García de Arquer,Randy P. Sabatini,Grant Walters,Oleksandr Voznyy,Riccardo Comin,Yiying Li,James Z. Fan,Hairen Tan,Jun Pan,Mingjian Yuan,Osman M. Bakr,Zheng-Hong Lu,Dong Ha Kim,Edward H. Sargent +16 more
TL;DR: This work tailor the composition of quasi-2D perovskites to direct the energy transfer into the lowest-bandgap minority phase and to do so faster than it is lost to nonradiative centers, and reports light-emitting diodes with external quantum efficiencies of 7.4% and a high luminescence of 8400 cd/m2.