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 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 GABr Post-Treatment for High-Performance MAPbI3 Solar Cells on Rigid Glass and Flexible Substrate

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 750
Author(s):  
Tingting Chen ◽  
Rui He ◽  
Fan Zhang ◽  
Xia Hao ◽  
Zhipeng Xuan ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Flexible Substrate ◽  
Perovskite Solar Cells ◽  
Post Treatment ◽  
Hysteresis Effect ◽  
Photoelectric Conversion Efficiency ◽  
Trap States ◽  
Photoelectric Conversion ◽  
Hybrid Perovskite

Perovskite solar cells have exhibited astonishing photoelectric conversion efficiency and have shown a promising future owing to the tunable content and outstanding optoelectrical property of hybrid perovskite. However, the devices with planar architecture still suffer from huge Voc loss and severe hysteresis effect. In this research, Guanidine hydrobromide (GABr) post-treatment is carried out to enhance the performance of MAPbI3 n-i-p planar perovskite solar cells. The detailed characterization of perovskite suggests that GABr post-treatment results in a smoother absorber layer, an obvious reduction of trap states and optimized energy level alignment. By utilizing GABr post-treatment, the Voc loss is reduced, and the hysteresis effect is alleviated effectively in MAPbI3 solar cells. As a result, solar cells based on glass substrate with efficiency exceeding 20%, Voc of 1.13 V and significantly mitigated hysteresis are fabricated successfully. Significantly, we also demonstrate the effectiveness of GABr post-treatment in flexible device, whose efficiency is enhanced from 15.77% to 17.57% mainly due to the elimination of Voc loss.

1D–2D hybrids as efficient optoelectronic materials: a study on graphitic carbon nitride nanosheets wrapped with zinc oxide rods

2018 ◽  
Vol 47 (13) ◽  
pp. 4501-4507 ◽  
Author(s):  
A. Sett ◽  
D. Das ◽  
D. Banerjee ◽  
U. K. Ghorai ◽  
N. S. Das ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Chemical Process ◽  
Carbon Nitride ◽  
Zno Nanorods ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Optoelectronic Materials ◽  
Simple Chemical ◽  
Carbon Nitride Nanosheets

Zinc oxide (ZnO) nanorods (NRs) wrapped with graphitic carbon nitride (GCN) nanosheet (NS) hybrids have been synthesized by a simple chemical process.

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.

Modulation of NF-κB–Dependent Gene Expression by H2O2: A Major Role for a Simple Chemical Process in a Complex Biological Response

2009 ◽  
Vol 11 (9) ◽  
pp. 2043-2053 ◽  
Author(s):  
Virgínia Oliveira-Marques ◽  
H. Susana Marinho ◽  
Luísa Cyrne ◽  
Fernando Antunes
Keyword(s):  
Gene Expression ◽  
Chemical Process ◽  
Biological Response ◽  
Simple Chemical

Structural interpretation, growth mechanism and optical properties of ZnO nanorods synthesized by a simple wet chemical route

RSC Advances ◽  
2015 ◽  
Vol 5 (29) ◽  
pp. 23101-23113 ◽  
Author(s):  
Samapti Kundu ◽  
Sumanta Sain ◽  
Biswarup Satpati ◽  
Satya Ranjan Bhattacharyya ◽  
Swapan Kumar Pradhan
Keyword(s):  
Optical Properties ◽  
Growth Mechanism ◽  
Chemical Process ◽  
Room Temperature ◽  
Zno Nanorods ◽  
Capping Agent ◽  
Chemical Route ◽  
Simple Chemical ◽  
Wet Chemical ◽  
Wet Chemical Route

ZnO nanorods are synthesized at room temperature through a simple chemical process without using any template or capping agent.

Micro-Patterned Substrates With Nano-Scale Elements for Pool Boiling

2011 ◽  
Author(s):  
Chad N. Hunter ◽  
Nicholas R. Glavin ◽  
Chris Muratore ◽  
Timothy S. Fisher ◽  
John G. Jones ◽  
...  
Keyword(s):  
Heat Flux ◽  
Chemical Process ◽  
Heat Fluxes ◽  
Test Surface ◽  
Nano Scale ◽  
Boiling Process ◽  
Simple Chemical ◽  
Post Test ◽  
Lower Heat ◽  
Layer Composition

The critical heat flux values of copper substrates were increased from 87 to 125 W/cm2 by using a simple chemical process resulting in growth of micro and nano-scale copper structures on the surface. Pre- and post-test surface analysis revealed that the morphology of the micro and nano-scale features of these copper structures changed during the boiling process accompanied by a change in oxide layer composition. Boiling performance of the micro and nano-structured samples was repeatable when testing at lower heat fluxes.

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