Doping and Photon Induced Defect Healing of Hybrid Perovskite Thin Films: An Approach Towards Efficient Light Emitting Diodes

ChemNanoMat ◽  
2019 ◽  
Vol 5 (5) ◽  
pp. 666-673 ◽  
Author(s):  
Anil Kanwat ◽  
Won‐Chul Choi ◽  
Sudipta Seth ◽  
Jin Jang
Keyword(s):  
Thin Films ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Defect Healing ◽  
Hybrid Perovskite

Facile Assembly of High-Quality Organic-Inorganic Hybrid Perovskite Quantum Dot Thin Films for Bright Light-Emitting Diodes

2018 ◽  
Vol 28 (11) ◽  
pp. 1705189 ◽  
Author(s):  
Xiangcheng Jin ◽  
Xiujuan Zhang ◽  
Huan Fang ◽  
Wei Deng ◽  
Xiuzhen Xu ◽  
...  
Keyword(s):  
Thin Films ◽  
Quantum Dot ◽  
Light Emitting Diodes ◽  
Bright Light ◽  
High Quality ◽  
Inorganic Hybrid ◽  
Light Emitting ◽  
Hybrid Perovskite

scholarly journals Two-dimensional perovskites with alternating cations in the interlayer space for stable light-emitting diodes

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Yiyue Zhang ◽  
Masoumeh Keshavarz ◽  
Elke Debroye ◽  
Eduard Fron ◽  
Miriam Candelaria Rodríguez González ◽  
...  
Keyword(s):  
Thin Films ◽  
Near Infrared ◽  
Light Emitting Diodes ◽  
Interlayer Space ◽  
High Current Density ◽  
Operational Stability ◽  
Infrared Light ◽  
Two Dimensional ◽  
Commercial Development ◽  
Light Emitting

Abstract Lead halide perovskites have attracted tremendous attention in photovoltaics due to their impressive optoelectronic properties. However, the poor stability of perovskite-based devices remains a bottleneck for further commercial development. Two-dimensional perovskites have great potential in optoelectronic devices, as they are much more stable than their three-dimensional counterparts and rapidly catching up in performance. Herein, we demonstrate high-quality two-dimensional novel perovskite thin films with alternating cations in the interlayer space. This innovative perovskite provides highly stable semiconductor thin films for efficient near-infrared light-emitting diodes (LEDs). Highly efficient LEDs with tunable emission wavelengths from 680 to 770 nm along with excellent operational stability are demonstrated by varying the thickness of the interlayer spacer cation. Furthermore, the best-performing device exhibits an external quantum efficiency of 3.4% at a high current density (J) of 249 mA/cm2 and remains above 2.5% for a J up to 720 mA cm−2, leading to a high radiance of 77.5 W/Sr m2 when driven at 6 V. The same device also shows impressive operational stability, retaining almost 80% of its initial performance after operating at 20 mA/cm2 for 350 min. This work provides fundamental evidence that this novel alternating interlayer cation 2D perovskite can be a promising and stable photonic emitter.

Quasi‐2D CsPbBr x I 3− x Composite Thin Films for Efficient and Stable Red Perovskite Light‐Emitting Diodes

2021 ◽  
pp. 2101419
Author(s):  
Ping Liu ◽  
Wanqing Cai ◽  
Cong Zhao ◽  
Siwei Zhang ◽  
Pengbo Nie ◽  
...  
Keyword(s):  
Thin Films ◽  
Light Emitting Diodes ◽  
Composite Thin Films ◽  
Light Emitting

Effects of thermal treatment on organic-inorganic hybrid perovskite films and luminous efficiency of light-emitting diodes

2016 ◽  
Vol 16 (9) ◽  
pp. 1069-1074 ◽  
Author(s):  
Young-Hoon Kim ◽  
Himchan Cho ◽  
Jin Hyuck Heo ◽  
Sang Hyuk Im ◽  
Tae-Woo Lee
Keyword(s):  
Thermal Treatment ◽  
Light Emitting Diodes ◽  
Luminous Efficiency ◽  
Inorganic Hybrid ◽  
Light Emitting ◽  
Hybrid Perovskite

Efficient organic light-emitting diodes using polycrystalline silicon thin films as semitransparent anode

2005 ◽  
Vol 87 (8) ◽  
pp. 083504 ◽  
Author(s):  
X. L. Zhu ◽  
J. X. Sun ◽  
H. J. Peng ◽  
Z. G. Meng ◽  
M. Wong ◽  
...  
Keyword(s):  
Thin Films ◽  
Polycrystalline Silicon ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Silicon Thin Films ◽  
Organic Light

scholarly journals Perovskite-molecule composite thin films for efficient and stable light-emitting diodes

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Heyong Wang ◽  
Felix Utama Kosasih ◽  
Hongling Yu ◽  
Guanhaojie Zheng ◽  
Jiangbin Zhang ◽  
...  
Keyword(s):  
Thin Films ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Degradation Mechanism ◽  
Deep Understanding ◽  
Significant Progress ◽  
High Quality ◽  
Composite Thin Films ◽  
Light Emitting

AbstractAlthough perovskite light-emitting diodes (PeLEDs) have recently experienced significant progress, there are only scattered reports of PeLEDs with both high efficiency and long operational stability, calling for additional strategies to address this challenge. Here, we develop perovskite-molecule composite thin films for efficient and stable PeLEDs. The perovskite-molecule composite thin films consist of in-situ formed high-quality perovskite nanocrystals embedded in the electron-transport molecular matrix, which controls nucleation process of perovskites, leading to PeLEDs with a peak external quantum efficiency of 17.3% and half-lifetime of approximately 100 h. In addition, we find that the device degradation mechanism at high driving voltages is different from that at low driving voltages. This work provides an effective strategy and deep understanding for achieving efficient and stable PeLEDs from both material and device perspectives.

scholarly journals Highly stable hybrid perovskite light-emitting diodes based on Dion-Jacobson structure

2019 ◽  
Vol 5 (8) ◽  
pp. eaaw8072 ◽  
Author(s):  
Yuequn Shang ◽  
Yuan Liao ◽  
Qi Wei ◽  
Ziyu Wang ◽  
Bo Xiang ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
First Principles Calculations ◽  
Bridging Ligands ◽  
Inorganic Hybrid ◽  
Light Emitting ◽  
Hybrid Perovskite ◽  
Halide Perovskites ◽  
Stable Hybrid ◽  
Poor Stability

Organic-inorganic hybrid halide perovskites are emerging as promising materials for next-generation light-emitting diodes (LEDs). However, the poor stability of these materials has been the main obstacle challenging their application. Here, we performed first-principles calculations, revealing that the molecule dissociation energy of Dion-Jacobson (DJ) structure using 1,4-bis(aminomethyl)benzene molecules as bridging ligands is two times higher than the typical Ruddlesden-Popper (RP) structure based on phenylethylammonium ligands. Accordingly, LEDs based on the DJ structure show a half-lifetime over 100 hours, which is almost two orders of magnitude longer compared with those based on RP structural quasi–two-dimensional perovskite. To the best of our knowledge, this is the longest lifetime reported for all organic-inorganic hybrid perovskites operating at the current density, giving the highest external quantum efficiency (EQE) value. In situ tracking of the film composition in operation indicates that the DJ structure was maintained well after continuous operation under an electric field.

Sign in / Sign up

Export Citation Format

Share Document