Optimizing the central steric hindrance of cross-linkable hole transport materials for achieving highly efficient RGB QLEDs

2020 ◽  
Vol 4 (11) ◽  
pp. 3368-3377
Author(s):  
Wenchao Zhao ◽  
Liming Xie ◽  
Yuan-Qiu-Qiang Yi ◽  
Xiaolian Chen ◽  
Jianfeng Hu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Steric Hindrance ◽  
Optoelectronic Devices ◽  
Hole Transport ◽  
Cross Linking ◽  
Solvent Resistance ◽  
Highly Efficient

Cross-linking strategies of hole transport materials (HTMs) have been widely investigated and used in various optoelectronic devices, mainly owing to their excellent solvent resistance and thermal stability.

Highly Efficient Polymer-Based Optoelectronic Devices Using PEDOT:PSS and a GO Composite Layer as a Hole Transport Layer

2014 ◽  
Vol 6 (3) ◽  
pp. 2067-2073 ◽  
Author(s):  
Jae Choul Yu ◽  
Jeong In Jang ◽  
Bo Ram Lee ◽  
Geon-Woong Lee ◽  
Joong Tark Han ◽  
...  
Keyword(s):  
Composite Layer ◽  
Optoelectronic Devices ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Highly Efficient

scholarly journals Enzymatic and Chemical Cross-Linking of Bacterial Cellulose/Fish Collagen Composites—A Comparative Study

2021 ◽  
Vol 22 (7) ◽  
pp. 3346
Author(s):  
Agata Sommer ◽  
Paulina Dederko-Kantowicz ◽  
Hanna Staroszczyk ◽  
Sławomir Sommer ◽  
Marek Michalec
Keyword(s):  
Thermal Stability ◽  
Bacterial Cellulose ◽  
Secondary Alcohol ◽  
Water Vapor Permeability ◽  
Polymer Chains ◽  
Cross Linking ◽  
Vapor Permeability ◽  
Covalent Bonds ◽  
Fish Collagen ◽  
Chemical Cross Linking

This article compares the properties of bacterial cellulose/fish collagen composites (BC/Col) after enzymatic and chemical cross-linking. In our methodology, two transglutaminases are used for enzymatic cross-linking—one recommended for the meat and the other proposed for the fish industry—and pre-oxidated BC (oxBC) is used for chemical cross-linking. The structure of the obtained composites is characterized by scanning electron microscopy, thermogravimetric analysis, X-ray diffraction, and Fourier transform infrared spectroscopy, and their functional properties by mechanical and water barrier tests. While polymer chains in uncross-linked BC/Col are intertwined by H-bonds, new covalent bonds in enzymatically cross-linked ones are formed—resulting in increased thermal stability and crystallinity of the material. The C2–C3 bonds cleavage in D-glucose units, due to BC oxidation, cause secondary alcohol groups to vanish in favor of the carbonyl groups’ formation, thus reducing the number of H-bonded OHs. Thermal stability and crystallinity of oxBC/Col remain lower than those of BC/Col. The BC/Col formation did not affect tensile strength and water vapor permeability of BC, but enzymatic cross-linking with TGGS improved them significantly.

Crystal structure, luminescence, and thermal stability of CsAlSi2O6:Tb3+ phosphors with highly efficient green emission

2021 ◽  
pp. 111441
Author(s):  
Seiya Shimono ◽  
Taichi Izaki ◽  
Nagisa Tanaka ◽  
Yasushi Nanai ◽  
Takaaki Morimoto ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Thermal Stability ◽  
Green Emission ◽  
Highly Efficient ◽  
Thermal Stability Of

scholarly journals 3D Graphene Nanosheets from Plastic Waste for Highly Efficient HTM free Perovskite Solar Cells

2021 ◽  
Author(s):  
Sandeep Pandey ◽  
Amit Kumar ◽  
Manoj Karakoti ◽  
Kuldeep K. Garg ◽  
Aniket Rana ◽  
...  
Keyword(s):  
Solar Cells ◽  
Graphene Nanosheets ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Plastic Waste ◽  
Waste Plastic ◽  
3D Graphene ◽  
Highly Efficient ◽  
First Time

Herein, we report the first time application of waste plastic derived 3D graphene nanosheets (GNs) for hole transport material (HTM) free perovskite solar cells (PSCs), where 3D GNs has been...

A comparative study of o,p-dimethoxyphenyl-based hole transport materials by altering π-linker units for highly efficient and stable perovskite solar cells

2017 ◽  
Vol 5 (21) ◽  
pp. 10480-10485 ◽  
Author(s):  
Xing Li ◽  
Molang Cai ◽  
Zhongmin Zhou ◽  
Kang Yun ◽  
Fengxian Xie ◽  
...  
Keyword(s):  
Solar Cells ◽  
Comparative Study ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Highly Efficient

Two easily synthesized o,p-dimethoxyphenyl-based hole transport materials (HTMs) containing biphenyl (HL-1) and carbazole (HL-2) in the π-system, respectively, have been designed and studied for perovskite solar cells (PSCs).

Attainment of Stable (FTO/ZnO/CdS/CH3NH3SnI3/GaAs/Au) Perovskite Solar Cell With Above 23% Photovoltaic Performance Using Solar Capacitance Simulator

2021 ◽  
Author(s):  
Irfan Qasim ◽  
Owais Ahmad ◽  
Asim Rashid ◽  
Tashfeen Zehra ◽  
Muhammad Imran Malik ◽  
...  
Keyword(s):  
Solar Cells ◽  
Defect Density ◽  
Short Circuit ◽  
Photovoltaic Performance ◽  
Hole Transport ◽  
Transport Layer ◽  
Buffer Layers ◽  
Electron Transport Layer ◽  
Device Performance ◽  
Highly Efficient

Abstract Solar energy is found to be low cost and abundant of all available energy resources and needs exploration of highly efficient devices for global energy requirements. We have investigated methyl ammonium tin halide (CH3NH3SnI3)-based perovskite solar cells (PSCs) for optimized device performance using solar capacitance simulator SCAPS-1D software. This study is a step forward towards availability of stable and non-toxic solar cells. We explored all necessary parameters such as metal work functions, thickness of absorber and buffer layers, charge carrier’s mobility and defect density for improved device performance. Calculations revealed that for the best efficiency of device the maximum thickness of the perovskite absorber layer must be 4.2 μm. Furthermore, optimized thickness values of (ZnO=0.01 μm) as electron transport layer (ETL), GaAs as hole transport layer (HTL=3.02 μm) and (CdS=10 nm) and buffer layer have provided power conversion efficiency (PCE) of 23.53%. Variation of open circuit voltage (Voc), Short circuit current (Jsc), Fill Factor (FF%) and quantum efficiency against thickness of all layers in FTO/ZnO/CdS/CH3NH3SnI3/GaAs/Au compositions have been critically explored and reported. Interface defects and defect density in different inserted layers have also been reported in this study as they can play a crucial for the device performance. Insertion of ZnO layer and CdS buffer layers have shown improved device performance and PCE. Current investigations may prove to be useful for designing and fabrication of climate friendly, non-toxic and highly efficient solar cells.

scholarly journals Solution-processed double-layered hole transport layers for highly-efficient cadmium-free quantum-dot light-emitting diodes

2020 ◽  
Vol 28 (5) ◽  
pp. 6134 ◽  
Author(s):  
Fei Chen ◽  
Li-Jin Wang ◽  
Xu Li ◽  
Zhen-Bo Deng ◽  
Feng Teng ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Light Emitting Diodes ◽  
Hole Transport ◽  
Solution Processed ◽  
Light Emitting ◽  
Highly Efficient ◽  
Hole Transport Layers
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