scholarly journals Lone-pair effect on carrier capture in Cu2ZnSnS4solar cells

2019 ◽  
Vol 7 (6) ◽  
pp. 2686-2693 ◽  
Author(s):  
Sunghyun Kim ◽  
Ji-Sang Park ◽  
Samantha N. Hood ◽  
Aron Walsh
Keyword(s):  
Solar Cells ◽  
Fast Electron ◽  
Lone Electron Pair ◽  
Electron Pair ◽  
Lone Pair ◽  
Electron Hole ◽  
Carrier Capture ◽  
Hole Recombination

Fast electron–hole recombination in kesterite solar cells is linked to the chemistry of the Sn lone electron pair.

Structure of russellite (Bi2WO6): origin of ferroelectricity and the effect of the stereoactive lone electron pair on the structure

2018 ◽  
Vol 74 (3) ◽  
pp. 295-303 ◽  
Author(s):  
Hiroki Okudera ◽  
Yuka Sakai ◽  
Kentaro Yamagata ◽  
Hiroaki Takeda
Keyword(s):  
Low Temperature ◽  
Lone Electron Pair ◽  
Electron Pair ◽  
Lone Pair ◽  
Orthorhombic Phase ◽  
Electrostatic Charge ◽  
X Ray Diffraction ◽  
Coordination Environment ◽  
X Ray ◽  
Powder Neutron Diffraction

The structure of the low-temperature polar (orthorhombic) phase of russellite (Bi2WO6) was examined on artificial specimens with precise single-crystal X-ray diffraction experiments. The final atomic arrangement thus obtained was identical to that reported by Knight [Miner. Mag. (1992), 56, 399–409] with powder neutron diffraction. The residual density attributable to a stereochemically-active lone pair of electrons of bismuth was prominent at approximately the centre of a larger cap of BiO8 square antiprisms, that is on the line from the Bi sites to an adjacent WO4 2− slab along the b-axis direction. Quite uneven Bi—O distances and the formation of a vacant coordination hemisphere (within 3 Å) should, therefore, be ascribed to the strong demand of bismuth to form shorter Bi—O bonds to use up its electrostatic charge within its coordination environment. The shift of bismuth along −c propagates via the correlated shift of the W site and these cooperative shifts cause ferroelectricity in the compound. This propagation was easily effected by the intrusion of molecules such as acetone into the structure.

Toward charge extraction in all-inorganic perovskite solar cells by interfacial engineering

2018 ◽  
Vol 6 (44) ◽  
pp. 21999-22004 ◽  
Author(s):  
Jie Ding ◽  
Jialong Duan ◽  
Chenyang Guo ◽  
Qunwei Tang
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Electron Hole ◽  
Inorganic Perovskite ◽  
Interfacial Engineering ◽  
Charge Extraction ◽  
Hole Recombination

CuInS2/ZnS QDs with tunable bandgaps were applied at the CsPbBr3/carbon interface for improved hole extraction and reduced electron–hole recombination. A PCE of as high as 8.42% was achieved for QDs tailored all-inorganic PSC in comparison with 6.01% for the pristine device.

Inverted perovskite solar cells with inserted cross-linked electron-blocking interlayers for performance enhancement

2015 ◽  
Vol 3 (17) ◽  
pp. 9291-9297 ◽  
Author(s):  
Hong-Jyun Jhuo ◽  
Po-Nan Yeh ◽  
Sih-Hao Liao ◽  
Yi-Lun Li ◽  
Sunil Sharma ◽  
...  
Keyword(s):  
Solar Cells ◽  
Performance Enhancement ◽  
Perovskite Solar Cells ◽  
Type Solution ◽  
Electron Hole ◽  
Solvent Resistance ◽  
Solution Processed ◽  
Hole Recombination

Cross-linked anode interlayers (X-QUPD or X-OTPD) with solvent-resistance provide electron blocking to reduce electron–hole recombination for improving PCE of invert type solution processed perovskite solar cells.

Exploration of the α-effect by substitution on hydroxylamine anions. I. Effects of alkyl- and fluoroalkylation

2014 ◽  
Vol 92 (4) ◽  
pp. 346-353 ◽  
Author(s):  
D. Afzal ◽  
K.R. Fountain
Keyword(s):  
Oxygen Atom ◽  
Lone Electron Pair ◽  
Electron Pair ◽  
Lone Pair ◽  
Electronic Effects ◽  
Important Indicator ◽  
Comprehensive Study ◽  
Simple Models

Many explanations for the α-effect have been suggested. Most are simple models conjecturing various sources affecting the nucleophilic behavior. This paper provides a comprehensive study of electronic effects using the single α-atom lone electron pair of substituted hydroxyl amine anions. This substituent scheme shows that the interaction of this lone pair with the negatively charged oxygen atom is an important indicator of reactivity.

scholarly journals Research Update: Relativistic origin of slow electron-hole recombination in hybrid halide perovskite solar cells

APL Materials ◽  
2016 ◽  
Vol 4 (9) ◽  
pp. 091501 ◽  
Author(s):  
Pooya Azarhoosh ◽  
Scott McKechnie ◽  
Jarvist M. Frost ◽  
Aron Walsh ◽  
Mark van Schilfgaarde
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Slow Electron ◽  
Electron Hole ◽  
Halide Perovskite ◽  
Hole Recombination

Synergic effects of upconversion nanoparticles NaYbF4:Ho3+ and ZrO2 enhanced the efficiency in hole-conductor-free perovskite solar cells

Nanoscale ◽  
2018 ◽  
Vol 10 (46) ◽  
pp. 22003-22011 ◽  
Author(s):  
Yanyan Li ◽  
Li Zhao ◽  
Meng Xiao ◽  
Yimin Huang ◽  
Binghai Dong ◽  
...  
Keyword(s):  
Solar Cells ◽  
Visible Light ◽  
Recombination Rate ◽  
Perovskite Solar Cells ◽  
Upconversion Nanoparticles ◽  
Electron Hole ◽  
Dual Functional ◽  
Nir Light ◽  
Hole Recombination

This design enabled the dual-functional effects, that is, the harvesting of NIR light and its conversion to visible light and the reduction of the electron–hole recombination rate.

Enhancement of TiO2 Particles Based-Solar Cells Efficiency by Addition of Copper(II) Nitrate and Post-Treatment with Sodium Hydroxyde

2015 ◽  
Vol 1112 ◽  
pp. 245-250 ◽  
Author(s):  
Mamat Rokhmat ◽  
Edy Wibowo ◽  
Sutisna ◽  
Elfi Yuliza ◽  
Khairurrijal ◽  
...  
Keyword(s):  
Solar Cells ◽  
Fill Factor ◽  
Active Material ◽  
Post Treatment ◽  
Electron Hole ◽  
Copper Particles ◽  
Ionic Transfer ◽  
Nitrate Trihydrate ◽  
Spray Method ◽  
Hole Recombination

Efficiency enhancement of solar cells employing TiO2 as the active material has been successfully done by addition of copper(II) nitrate trihydrate (Cu(NO3)2.3H2O) in the TiO2 dispersant, and post-treatment with sodium hydroxide (NaOH) after electroplating of copper particles at spaces inside the TiO2 film. Homogeneously mix of TiO2 particles in the solution of Cu(NO3)2.3H2O was deposited on a transparent conducting electrode using a spray method. To reduce electron-hole recombination, copper particles were deposited on the space between TiO2 particles by electroplating. A sample of solar cell was made by sandwiching a polymer electrolyte between the film and a counter electrode. Copper(II) nitrate trihydrate of 1.4 wt% and 5 volt electroplating voltage are able to produce an optimum power conversion efficiency of 0.35% with a fill factor of 0.31. To achieve higher efficiency, post treatment with NaOH was performed to increase the ionic transfer ability in electrolyte and we observed efficiency up to 1.24% with a fill factor of 0.34.

Enhanced electron lifetime in dye-sensitised solar cells via suppression of electron-hole recombination

2016 ◽  
Vol 13 (4/5/6) ◽  
pp. 365
Author(s):  
Seonhee Lee ◽  
Hyunjun Yoo ◽  
Hyunjung Shin
Keyword(s):  
Solar Cells ◽  
Electron Lifetime ◽  
Electron Hole ◽  
Hole Recombination

Electron‐hole recombination in reactively sputtered amorphous silicon solar cells

1981 ◽  
Vol 39 (9) ◽  
pp. 721-723 ◽  
Author(s):  
T. D. Moustakas ◽  
C. R. Wronski ◽  
T. Tiedje
Keyword(s):  
Solar Cells ◽  
Amorphous Silicon ◽  
Silicon Solar Cells ◽  
Electron Hole ◽  
Hole Recombination

Interface engineering of perovskite solar cells with PEO for improved performance

2015 ◽  
Vol 3 (18) ◽  
pp. 9999-10004 ◽  
Author(s):  
H. P. Dong ◽  
Y. Li ◽  
S. F. Wang ◽  
W. Z. Li ◽  
N. Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Collection Efficiency ◽  
Perovskite Solar Cells ◽  
Device Performance ◽  
Interface Engineering ◽  
Electron Hole ◽  
Electron Collection ◽  
Improved Performance ◽  
Hole Recombination ◽  
Electron Collection Efficiency

A thin PEO layer was spin-coated on top of TiOx to modify the ETL for improved electron collection efficiency and better retarded electron–hole recombination, and therefore enhance device performance.

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