Results 71 to 80 of about 7,765 (302)

High-efficiency quantum dot light-emitting diodes employing lithium salt doped poly(9-vinlycarbazole) as a hole-transporting layer

, 2017
The maximum external quantum efficiency of the device is 11.46% using PVK doped Li-TFSI as the hole-transporting layer.
Xue-Dong Wang, Feng Liang, Ying-Li Shi, Liang-Sheng Liao, Yun Hu, Zhao-Kui Wang   +5 more
core   +1 more source

Dislocation-assisted electron and hole transport in GaN epitaxial layers

Nature Communications
Dislocations significantly influence carrier transport in semiconductors. While segments orthogonal to the channel act as scattering centers impeding conduction, electrically active dislocation cores can facilitate carrier transport. However, the mechanisms governing carrier transport along dislocation cores remain unclear.
Yixu Yao, Sen Huang, Ruyue Cao, Zhaofu Zhang, Xinhua Wang, Qimeng Jiang, Jingyuan Shi, Chenrui Zhang, Jiaolong Liu, Ke Wei, Yi Pei, Hui Zhang, Hongtu Qian, Fuqiang Guo, Guoping Li, Ning Tang, Jun-Wei Luo, Weikun Ge, Xinyu Liu, Bo Shen, Kevin J. Chen   +20 more
openaire   +2 more sources

X‐Functionality–Driven Photocatalytic Hydrogen Evolution in 2D 4‐X‐PEA2SnI4 Perovskites

Advanced Functional Materials, EarlyView.
We report a water‐based synthesis of 2D 4‐X‐PEA2SnI4 perovskite microcrystals with prominent photocatalytic (PC) activity for H2 production. The synergy between organic functionalization and HI‐derived iodide scavenges holes suppress octahedral distortion, and favor electron accumulation, enabling a PC H2 evolution ∼20 µmol·g−1 and long‐term stability ...
Taeyeon Kim, Gayoung Seo, Seong Yeon Park, Juwon Jang, Yunho Ahn, Samiksha Mukesh Jain, Samrat Das Adhikari, Harumi Correa‐Leiva, Ignacio Utreras‐Asenjo, Oscar A. Douglas‐Gallardo, Carina Pareja‐Rivera, Kayoung Cho, Byeongsung Kim, Jhonatan Rodriguez‐Pereira, Eunseo Choi, JaeHong Park, Jin Ho Bang, Danilo H. Jara‐Quinteros, Sixto Giménez, Seog Joon Yoon, Andrés F. Gualdrón‐Reyes, Iván Mora‐Seró   +21 more
wiley   +1 more source

Introduction of Graphene Oxide as Buffer Layer in Perovskite Solar Cells and the Promotion of Soluble n-Butyl-substituted Copper Phthalocyanine as Efficient Hole Transporting Material

, 2017
Organometal halide perovskite solar cells have been constructed using soluble tetra-n-butyl-copper phthalocyanine as hole transporting material. Devices were constructed and characterized under ambient conditions of 50–60% ambient humidity.
Wang, Yu Long, Xu, Jia Ju, Dracopoulos, Vassilios, Nouri, Esmaiel, Paterakis, Georgios, Georgios Paterakis, Mohammadi, Mohammad Reza, Vassilios Dracopoulos, Xu, Zong Xiang, Esmaiel Nouri, Chen, Qian, Panagiotis Lianos, Tasis, Dimitrios, Jia-Ju Xu, Yu-Long Wang, Mohammad Reza Mohammadi, Zong-Xiang Xu, Dimitrios Tasis, Lianos, Panagiotis, Qian Chen   +19 more
core   +1 more source

Efficient All-Inorganic Perovskite Light-Emitting Diodes with Cesium Tungsten Bronze as a Hole-Transporting Layer

, 2020
The realization of high-performance optoelectronic devices requires excellent charge-transporting layers and efficient carrier recombination. Herein, we synthesized cesium tungsten bronze (Cs0.32WO3) nanocrystals and utilized them as the hole ...
Fang, XC, Zhou, XQ, Chen, WF, Ling, FCC, Wang, XD, Zhuo, MP, Liao, LS   +6 more
core   +1 more source

Memristor‐Driven Active‐Matrix Organic Light‐Emitting Diode for Energy Efficient and High‐Resolution Displays

Advanced Functional Materials, EarlyView.
This study demonstrates that memristors can replace conventional 2T–1C driving circuits with simplified 1T–1 m architectures by exploiting resistance switching. With ultra‐low switching voltages (< ±0.2 V) and multi‐level resistance states, the memristors precisely control the current injected into organic light‐emitting diodes (OLEDs).
Dong Hyun Kim, Nahyun Kim, Seok Hee Hong, Ho Jin Lee, Jin Suk Oh, Jae Seong Park, Tae Geun Kim   +6 more
wiley   +1 more source

Light-Emitting and Hole-Transporting Polymers for LEDs

, 1997
Various copolymers of arylene vinylenes, having strong fluorescence, showed predominantly the emission in the multi-layer device using an electron-transporting material(ETM) such as tris(8-quinolinolato)aluminum(Alq3).
Toshihiro Ohnishi, Shuji Doi, Masato Ueda, Fumi Yamaguchi, Takanobu Noguchi   +4 more
core   +1 more source

Rationally Designed Bilayer Passivation Strategy for High‐Performance Vacuum‐Processed Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
A bilayer “Anchor‐and‐Seal” passivation strategy using EDAI2 and 4MeO‐PEAI effectively mitigates surface defects in vacuum‐processed perovskite films through synergistic hydrogen bonding and Lewis base coordination. This approach optimizes interfacial energy alignment and suppresses non‐radiative recombination, enabling vacuum‐deposited p‐i‐n ...
Mohammadhossein Kohan, Sang‐Heon Lee, Jaswinder Singh, Sung‐Nam Kwon, Seok‐In Na   +4 more
wiley   +1 more source

Development of Simple Hole-transporting Materials for Perovskite Solar Cells

, 2015
Three low-cost propeller-shaped hole-transporting materials based on a triphenylamine core were investigated in perovskite solar cells. Each hole-transporting material was designed with highly modular side-arms, allowing for different bandgaps while ...
Hendsbee, Arthur, Welch, Gregory C., Hill, Ian G., Namespetra, Andrew   +3 more
core   +1 more source

Triarylamine Trisamide Interfacial Modulation for Perovskite Photovoltaics

Advanced Materials Interfaces
Hybrid perovskites stand out as one of the leading materials in the new generation of photovoltaics. Their stability under operating conditions, however, remains an ongoing challenge.
Masaud Almalki, Ghewa AlSabeh, Marco A. Ruiz‐Preciado, Hong Zhang, Melodie Galerne, Emilie Moulin, Felix Thomas Eickemeyer, Shaik M. Zakeeruddin, Jovana V. Milić, Nicolas Giuseppone, Michael Grätzel   +10 more
doaj   +1 more source