Bidentate Ligand-Passivated CsPbI3 Perovskite Nanocrystals for Stable Near-Unity Photoluminescence Quantum Yield and Efficient Red Light-Emitting Diodes.
Jun Pan,Yuequn Shang,Jun Yin,Michele De Bastiani,Wei Peng,Ibrahim Dursun,Lutfan Sinatra,Ahmed M. El-Zohry,Mohamed N. Hedhili,Abdul-Hamid M. Emwas,Omar F. Mohammed,Zhijun Ning,Osman M. Bakr +12 more
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TLDR
The postsynthesis passivation process for CsPbI3 NCs is developed by using a bidentate ligand, namely 2,2'-iminodibenzoic acid, which enables the passivated NCs to realize red light-emitting diodes (LEDs) with 5.02% external quantum efficiency and 748 cd/m2 luminance, surpassing by far LEDs made from the nonpassivating NCs.Abstract:
Although halide perovskite nanocrystals (NCs) are promising materials for optoelectronic devices, they suffer severely from chemical and phase instabilities. Moreover, the common capping ligands like oleic acid and oleylamine that encapsulate the NCs will form an insulating layer, precluding their utility in optoelectronic devices. To overcome these limitations, we develop a postsynthesis passivation process for CsPbI3 NCs by using a bidentate ligand, namely 2,2′-iminodibenzoic acid. Our passivated NCs exhibit narrow red photoluminescence with exceptional quantum yield (close to unity) and substantially improved stability. The passivated NCs enabled us to realize red light-emitting diodes (LEDs) with 5.02% external quantum efficiency and 748 cd/m2 luminance, surpassing by far LEDs made from the nonpassivated NCs.read more
Citations
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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
Metal Halide Perovskite Nanocrystals: Synthesis, Post-Synthesis Modifications and Their Optical Properties
Javad Shamsi,Alexander S. Urban,Muhammad Imran,Muhammad Imran,Luca De Trizio,Liberato Manna,Liberato Manna +6 more
TL;DR: In this paper, the authors provide an updated survey of the field of halide perovskite nanocomposite colloidal synthesis, with a main focus on their colloidal synthetic routes to control shape, size and optical properties of the resulting nano-crystals.
Journal ArticleDOI
Metal Halide Perovskite Nanocrystals: Synthesis, Post-Synthesis Modifications, and Their Optical Properties.
Javad Shamsi,Alexander S. Urban,Muhammad Imran,Muhammad Imran,Luca De Trizio,Liberato Manna,Liberato Manna +6 more
TL;DR: This review aims to provide an up-to-date survey of this fast-moving field and will mainly focus on the different colloidal synthesis approaches that have been developed and on the fundamental optical properties of halide perovskite nanocrystals.
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
Colloidal CsPbX3 (X = Cl, Br, I) Nanocrystals 2.0: Zwitterionic Capping Ligands for Improved Durability and Stability
Franziska Krieg,Franziska Krieg,Stefan T. Ochsenbein,Stefan T. Ochsenbein,Sergii Yakunin,Sergii Yakunin,Stephanie ten Brinck,Philipp Aellen,Philipp Aellen,Adrian Süess,Adrian Süess,Baptiste Clerc,Baptiste Clerc,Dominic Guggisberg,Dominic Guggisberg,Olga Nazarenko,Olga Nazarenko,Yevhen Shynkarenko,Yevhen Shynkarenko,Sudhir Kumar,Chih-Jen Shih,Ivan Infante,Maksym V. Kovalenko,Maksym V. Kovalenko +23 more
TL;DR: A new ligand capping strategy utilizing common and inexpensive long-chain zwitterionic molecules such as 3-(N,N-dimethyloctadecylammonio)propanesulfonate is proposed, resulting in much improved chemical durability and allows for the isolation of clean NCs with high photoluminescence quantum yields of above 90% after four rounds of precipitation/redispersion.
References
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Journal ArticleDOI
Sequential deposition as a route to high-performance perovskite-sensitized solar cells
Julian Burschka,Norman Pellet,Norman Pellet,Soo-Jin Moon,Robin Humphry-Baker,Peng Gao,Mohammad Khaja Nazeeruddin,Michael Grätzel +7 more
TL;DR: A sequential deposition method for the formation of the perovskite pigment within the porous metal oxide film that greatly increases the reproducibility of their performance and allows the fabrication of solid-state mesoscopic solar cells with unprecedented power conversion efficiencies and high stability.
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
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.
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
Low-temperature solution-processed wavelength-tunable perovskites for lasing
Guichuan Xing,Nripan Mathews,Swee Sien Lim,Natalia Yantara,Xinfeng Liu,Dharani Sabba,Michael Grätzel,Michael Grätzel,Subodh Mhaisalkar,Tze Chien Sum +9 more
TL;DR: It is revealed that solution-processed organic-inorganic halide perovskites (CH3NH3PbX3), which demonstrated huge potential in photovoltaics, also have promising optical gain and may show electrically driven lasing.