Journal ArticleDOI
50-Fold EQE Improvement up to 6.27% of Solution-Processed All-Inorganic Perovskite CsPbBr3 QLEDs via Surface Ligand Density Control
Jianhai Li,Leimeng Xu,Tao Wang,Jizhong Song,Jiawei Chen,Xue Jie,Yuhui Dong,Bo Cai,Qingsong Shan,Boning Han,Haibo Zeng +10 more
TLDR
Solution-processed CsPbBr3 quantum-dot light-emitting diodes with a 50-fold external quantum efficiency improvement are achieved through balancing surface passivation and carrier injection via ligand density control, which induces the coexistence of high levels of ink stability, photoluminescence quantum yields, thin-film uniformity, and carrier-injection efficiency.Abstract:
Solution-processed CsPbBr3 quantum-dot light-emitting diodes with a 50-fold external quantum efficiency improvement (up to 6.27%) are achieved through balancing surface passivation and carrier injection via ligand density control (treating with hexane/ethyl acetate mixed solvent), which induces the coexistence of high levels of ink stability, photoluminescence quantum yields, thin-film uniformity, and carrier-injection efficiency.read more
Citations
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Journal ArticleDOI
Properties and potential optoelectronic applications of lead halide perovskite nanocrystals
Maksym V. Kovalenko,Maksym V. Kovalenko,Loredana Protesescu,Loredana Protesescu,Maryna I. Bodnarchuk +4 more
TL;DR: The prospects of LHP NCs for optoelectronic applications such as in television displays, light-emitting devices, and solar cells are surveyed, emphasizing the practical hurdles that remain to be overcome.
Journal ArticleDOI
Genesis, challenges and opportunities for colloidal lead halide perovskite nanocrystals
Quinten A. Akkerman,Quinten A. Akkerman,Gabriele Rainò,Gabriele Rainò,Maksym V. Kovalenko,Maksym V. Kovalenko,Liberato Manna,Liberato Manna +7 more
TL;DR: Lead-halide perovskites have entered the family of colloidal nanocrystals, showing excellent optical properties and easy synthesizability, and insight is provided into their chemical versatility, stability challenges and use in optoelectronics.
Journal ArticleDOI
Anion-exchange red perovskite quantum dots with ammonium iodine salts for highly efficient light-emitting devices
Takayuki Chiba,Yukihiro Hayashi,Hinako Ebe,Keigo Hoshi,Jun Sato,Shugo Sato,Yong-Jin Pu,Satoru Ohisa,Junji Kido +8 more
TL;DR: In this paper, a red perovskite quantum dot-based light-emitting devices were fabricated by anion exchange from pristine CsPbBr3 using halide-anion-containing alkyl ammonium and aryl ionium salts.
Journal ArticleDOI
An overview on enhancing the stability of lead halide perovskite quantum dots and their applications in phosphor-converted LEDs
TL;DR: This review summarizes the mechanisms of intrinsic- and extrinsic-environment-induced decomposition of perovskite quantum dots and some possible solutions to improve the stability of PQDs together with suggestions for further improving the performance of pc-LEDs as well as the device lifetime.
Journal ArticleDOI
Efficient green light-emitting diodes based on quasi-two-dimensional composition and phase engineered perovskite with surface passivation.
Xiaolei Yang,Xiaolei Yang,Xingwang Zhang,Jinxiang Deng,Zema Chu,Qi Jiang,Junhua Meng,Pengyang Wang,Liuqi Zhang,Zhigang Yin,Jingbi You +10 more
TL;DR: Solution-processable halide perovskites have high luminous efficiency and excellent chemical tunability, making them ideal candidates for light-emitting diodes, and Yang et al. achieve high external quantum efficiency of 14% in the devices by fine-tuning the phase and passivating the surface defects.
References
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Journal ArticleDOI
Nanocrystals of Cesium Lead Halide Perovskites (CsPbX3, X = Cl, Br, and I): Novel Optoelectronic Materials Showing Bright Emission with Wide Color Gamut
Loredana Protesescu,Loredana Protesescu,Sergii Yakunin,Sergii Yakunin,Maryna I. Bodnarchuk,Maryna I. Bodnarchuk,Franziska Krieg,Franziska Krieg,Riccarda Caputo,Christopher H. Hendon,Ruo Xi Yang,Aron Walsh,Maksym V. Kovalenko,Maksym V. Kovalenko +13 more
TL;DR: The compelling combination of enhanced optical properties and chemical robustness makes CsPbX3 nanocrystals appealing for optoelectronic applications, particularly for blue and green spectral regions (410–530 nm), where typical metal chalcogenide-based quantum dots suffer from photodegradation.
Journal ArticleDOI
Bright light-emitting diodes based on organometal halide perovskite
Zhi-Kuang Tan,Reza Saberi Moghaddam,May Ling Lai,Pablo Docampo,Ruben Higler,Felix Deschler,Michael Price,Aditya Sadhanala,Luis M. Pazos,Dan Credgington,Fabian C. Hanusch,Thomas Bein,Henry J. Snaith,Richard H. Friend +13 more
TL;DR: It is shown, using photoluminescence studies, that radiative bimolecular recombination is dominant at higher excitation densities, Hence, the quantum efficiencies of the perovskite light-emitting diodes increase at higher current densities.
Journal ArticleDOI
Quantum Dot Light-Emitting Diodes Based on Inorganic Perovskite Cesium Lead Halides (CsPbX3)
TL;DR: The demonstration of these novel quantum-dot light-emitting diodes based on all-inorganic perovskite CsPbX3 (X = Cl, Br, I) nanocrystals opens a new avenue toward designing optoelectronic devices, such as displays, photodetectors, solar cells, and lasers.
Journal ArticleDOI
Overcoming the electroluminescence efficiency limitations of perovskite light-emitting diodes.
Himchan Cho,Su Hun Jeong,Min-Ho Park,Young-Hoon Kim,Christoph Wolf,Chang-Lyoul Lee,Jin Hyuck Heo,Aditya Sadhanala,NoSoung Myoung,Seunghyup Yoo,Sang Hyuk Im,Richard H. Friend,Tae-Woo Lee +12 more
TL;DR: Efficient organic-inorganic perovskite light-emitting diodes were made with nanograin crystals that lack metallic lead, which helped to confine excitons and avoid their quenching.
Journal ArticleDOI
CsPbX3 Quantum Dots for Lighting and Displays: Room-Temperature Synthesis, Photoluminescence Superiorities, Underlying Origins and White Light-Emitting Diodes
TL;DR: In this paper, a room-temperature (RT) synthesis of CsPbX3@X quantum-well band alignment is proposed to guarantee the excitons generation and high-rate radiative recombination at RT.