Journal ArticleDOI
All-Inorganic Quantum-Dot LEDs Based on a Phase-Stabilized α-CsPbI 3 Perovskite
Ya-Kun Wang,Ya-Kun Wang,Fanglong Yuan,Yitong Dong,Jiao-Yang Li,Andrew Johnston,Bin Chen,Makhsud I. Saidaminov,Makhsud I. Saidaminov,Chun Zhou,Xiaopeng Zheng,Yi Hou,Koen Bertens,Hinako Ebe,Dongxin Ma,Zhengtao Deng,Zhengtao Deng,Shuai Yuan,Rui Chen,Laxmi Kishore Sagar,Jiakai Liu,James Z. Fan,Peicheng Li,Xiyan Li,Yuan Gao,Man-Keung Fung,Zheng-Hong Lu,Osman M. Bakr,Liang-Sheng Liao,Edward H. Sargent +29 more
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TLDR
In this article, an inorganic ligand exchange was proposed to improve the phase stability of CsPbI3 perovskites and increase the thermal transport of the QD solids.Abstract:
The all-inorganic nature of CsPbI3 perovskites allows to enhance stability in perovskite devices. Research efforts have led to improved stability of the black phase in CsPbI3 films; however, these strategies-including strain and doping-are based on organic-ligand-capped perovskites, which prevent perovskites from forming the close-packed quantum dot (QD) solids necessary to achieve high charge and thermal transport. We developed an inorganic ligand exchange that leads to CsPbI3 QD films with superior phase stability and increased thermal transport. The atomic-ligand-exchanged QD films, once mechanically coupled, exhibit improved phase stability, and we link this to distributing strain across the film. Operando measurements of the temperature of the LEDs indicate that KI-exchanged QD films exhibit increased thermal transport compared to controls that rely on organic ligands. The LEDs exhibit a maximum EQE of 23 % with an electroluminescence emission centered at 640 nm (FWHM: ≈31 nm). These red LEDs provide an operating half-lifetime of 10 h (luminance of 200 cd m-2 ) and an operating stability that is 6× higher than that of control devices.read more
Citations
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Journal ArticleDOI
Perovskite light-emitting diodes
Azhar Fakharuddin,Mahesh K. Gangishetty,Mojtaba Abdi-Jalebi,Sang-Hyun Chin,Abd. Rashid bin Mohd Yusoff,Daniel N. Congreve,Wolfgang Tress,Felix Deschler,Maria Vasilopoulou,Henk J. Bolink +9 more
TL;DR: In this paper , a review of the development of perovskite light-emitting diodes is presented, exploring the key challenges involved in creating efficient and stable devices.
Journal ArticleDOI
Surface Chemistry Engineering of Perovskite Quantum Dots: Strategies, Applications, and Perspectives.
TL;DR: In this article, a critical overview focusing on the surface chemistry engineering of perovskite quantum dots (PQDs) including advanced colloidal synthesis, in-situ surface passivation, and solution phase/solid-state ligand exchange is presented, after which their unprecedented achievements in photovoltaics and other optoelectronics are presented.
Journal ArticleDOI
Characterization of stability and challenges to improve lifetime in perovskite LEDs
TL;DR: The current status and challenges in analysing and improving the stability of Pe LEDs are covered and some advice is suggested that will benefit the community to boost the operational lifetime of PeLEDs.
Journal ArticleDOI
A Universal Ternary‐Solvent‐Ink Strategy toward Efficient Inkjet‐Printed Perovskite Quantum Dot Light‐Emitting Diodes
Chang-Hwan Wei,Wenming Su,Jiantong Li,Bo Z. Xu,Qinsong Shan,Ye Wu,Fengjuan Zhang,Manman Luo,Hengyang Xiang,Zheng Cui,Haibo Zeng +10 more
TL;DR: In this paper , a tailor-made ternary halogen-free solvent (naphthene, n−tridecane, and n−nonane) recipe was proposed for CsPbX3 perovskite QDs and their corresponding inkjet-printed QLEDs.
References
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Journal ArticleDOI
Interface engineering of highly efficient perovskite solar cells
Huanping Zhou,Qi Chen,Gang Li,Song Luo,Tze Bing Song,Hsin Sheng Duan,Ziruo Hong,Jingbi You,Yongsheng Liu,Yang Yang +9 more
TL;DR: Perovskite films received a boost in photovoltaic efficiency through controlled formation of charge-generating films and improved current transfer to the electrodes and low-temperature processing steps allowed the use of materials that draw current out of the perovskites layer more efficiently.
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The emergence of perovskite solar cells
TL;DR: In this article, a review describes the rapid progress that has been made in hybrid organic-inorganic perovskite solar cells and their applications in the photovoltaic sector.
Journal ArticleDOI
Formamidinium lead trihalide: a broadly tunable perovskite for efficient planar heterojunction solar cells
Giles E. Eperon,Samuel D. Stranks,Christopher Menelaou,Michael B. Johnston,Laura M. Herz,Henry J. Snaith +5 more
TL;DR: In this article, the effect of replacing the methylammonium cation in this perovskite was explored, and it was shown that with the slightly larger formamidinium lead trihalide cation, one can synthesise a peroviscite with a bandgap tunable between 1.48 and 2.23 eV.
Journal ArticleDOI
Quantum dot-induced phase stabilization of α-CsPbI3 perovskite for high-efficiency photovoltaics.
Abhishek Swarnkar,Abhishek Swarnkar,Ashley R. Marshall,Ashley R. Marshall,Erin M. Sanehira,Erin M. Sanehira,Boris D. Chernomordik,David T. Moore,Jeffrey A. Christians,Tamoghna Chakrabarti,Joseph M. Luther +10 more
TL;DR: N nanoscale phase stabilization of CsPbI3 quantum dots (QDs) to low temperatures that can be used as the active component of efficient optoelectronic devices and describe the formation of α-CsP bI3 QD films that are phase-stable for months in ambient air.
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.
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