Facet-controlled preparation of hybrid perovskite microcrystals in the gas phase and the remarkable effect on optoelectronic properties

CrystEngComm ◽  
2017 ◽  
Vol 19 (31) ◽  
pp. 4615-4621 ◽  
Author(s):  
T. Kollek ◽  
S. Polarz
Keyword(s):  
Gas Phase ◽  
Particle Shape ◽  
Optoelectronic Properties ◽  
Trap States ◽  
Surface Trap ◽  
Remarkable Effect ◽  
Hybrid Perovskite ◽  
Controlled Preparation

Particle shape of hybrid perovskite microcrystals influences PL properties via differences in the abundant facets and associated surface trap states.

Facet-Dependent Surface Trap States and Carrier Lifetimes of Silicon

Nano Letters ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 1952-1958 ◽  
Author(s):  
Chih-Shan Tan ◽  
Yicheng Zhao ◽  
Rong-Hao Guo ◽  
Wei-Tsung Chuang ◽  
Lih-Juann Chen ◽  
...  
Keyword(s):  
Trap States ◽  
Surface Trap ◽  
Carrier Lifetimes

Reduction of intrinsic defects in hybrid perovskite films via precursor purification

2017 ◽  
Vol 53 (76) ◽  
pp. 10548-10551 ◽  
Author(s):  
Deliang Zhang ◽  
Bin-Bin Cui ◽  
Chenxiao Zhou ◽  
Liang Li ◽  
Yihua Chen ◽  
...  
Keyword(s):  
Chemical Process ◽  
Trap States ◽  
Intrinsic Defects ◽  
Hybrid Perovskite ◽  
Simple Chemical

A simple chemical process was developed in a scalable manner, to reduce trap states in perovskite absorbers from the very beginning.

scholarly journals Energetics of Nonradiative Surface Trap States in Nanoparticles Monitored by Time-of-Flight Photoconduction Measurements on Nanoparticle–Polymer Blends

2019 ◽  
Vol 11 (40) ◽  
pp. 37184-37192
Author(s):  
Xiaoqing Guo ◽  
Qianxun Gong ◽  
Joanna Borowiec ◽  
Sijie Zhang ◽  
Shuo Han ◽  
...  
Keyword(s):  
Polymer Blends ◽  
Time Of Flight ◽  
Trap States ◽  
Surface Trap

Hydrogen-bond enhancement triggered structural evolution and band gap engineering of hybrid perovskite (C6H5CH2NH3)2PbI4 under high pressure

2020 ◽  
Vol 22 (4) ◽  
pp. 1841-1846 ◽  
Author(s):  
Can Tian ◽  
Yongfu Liang ◽  
Wuhao Chen ◽  
Yanping Huang ◽  
Xiaoli Huang ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
High Pressure ◽  
Band Gap ◽  
Structural Evolution ◽  
Optoelectronic Properties ◽  
Band Gap Engineering ◽  
Hybrid Perovskite

Hybrid organic–inorganic perovskites (HOIPs) have gained substantial attention due to their excellent photovoltaic and optoelectronic properties.

Cryogenically probing the surface trap states of single nanowires passivated with self-assembled molecular monolayers

Nanoscale ◽  
2018 ◽  
Vol 10 (1) ◽  
pp. 82-86 ◽  
Author(s):  
Xingyan Zhao ◽  
Peng Tu ◽  
Jiajing He ◽  
Hong Zhu ◽  
Yaping Dan
Keyword(s):  
Trap States ◽  
Surface Trap ◽  
Molecular Monolayers ◽  
Cryogenic Technique ◽  
Single Nanowires ◽  
Self Assembled

We demonstrate a cryogenic technique that is capable of measuring the density of surface trap states in the full half bandgap without the exponential transient photoresponse assumption.

scholarly journals Efficient Photo- and Electroluminescence by Trap States Passivation in Vacuum-Deposited Hybrid Perovskite Thin Films

2018 ◽  
Vol 10 (42) ◽  
pp. 36187-36193 ◽  
Author(s):  
Benedikt Dänekamp ◽  
Nikolaos Droseros ◽  
Francisco Palazon ◽  
Michele Sessolo ◽  
Natalie Banerji ◽  
...  
Keyword(s):  
Thin Films ◽  
Trap States ◽  
Hybrid Perovskite

scholarly journals Mechanisms of triplet energy transfer across the inorganic nanocrystal/organic molecule interface

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Xiao Luo ◽  
Yaoyao Han ◽  
Zongwei Chen ◽  
Yulu Li ◽  
Guijie Liang ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Charge Transfer ◽  
Organic Molecule ◽  
Transient Absorption ◽  
High Energy ◽  
Model Systems ◽  
Trap States ◽  
Triplet Energy ◽  
Surface Trap ◽  
Triplet Energy Transfer

AbstractThe mechanisms of triplet energy transfer across the inorganic nanocrystal/organic molecule interface remain poorly understood. Many seemingly contradictory results have been reported, mainly because of the complicated trap states characteristic of inorganic semiconductors and the ill-defined relative energetics between semiconductors and molecules used in these studies. Here we clarify the transfer mechanisms by performing combined transient absorption and photoluminescence measurements, both with sub-picosecond time resolution, on model systems comprising lead halide perovskite nanocrystals with very low surface trap densities as the triplet donor and polyacenes which either favour or prohibit charge transfer as the triplet acceptors. Hole transfer from nanocrystals to tetracene is energetically favoured, and hence triplet transfer proceeds via a charge separated state. In contrast, charge transfer to naphthalene is energetically unfavourable and spectroscopy shows direct triplet transfer from nanocrystals to naphthalene; nonetheless, this “direct” process could also be mediated by a high-energy, virtual charge-transfer state.

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