scholarly journals Synergy between Ion Migration and Charge Carrier Recombination in Metal-Halide Perovskites

2020 ◽  
Vol 142 (6) ◽  
pp. 3060-3068 ◽  
Author(s):  
Chuan-Jia Tong ◽  
Linqiu Li ◽  
Li-Min Liu ◽  
Oleg V. Prezhdo
Keyword(s):  
Charge Carrier ◽  
Metal Halide ◽  
Ion Migration ◽  
Carrier Recombination ◽  
Halide Perovskites ◽  
Charge Carrier Recombination

scholarly journals Hybrid perovskites: Charge carrier recombination effects in photovoltaic devices

2021 ◽  
Vol 5 (2) ◽  
Author(s):  
O. Amora
Keyword(s):  
Charge Carrier ◽  
Bulk Material ◽  
Low Cost ◽  
Electronic Conductivity ◽  
Perovskite Solar Cells ◽  
Carrier Recombination ◽  
Recombination Processes ◽  
Halide Perovskites ◽  
Charge Carrier Recombination ◽  
Lead Halide

Hybrid lead halide perovskites emerged at the beginning of 2010s decade as one of the most promising materials for photovoltaic applications. Easy and low-cost solution-based fabrication processes can be used, obtaining perovskite solar cells (PSCs) with efficiencies above 20%. However, there still are some major issues to overcome, like stabiliddty, and the general understanding of the recombination mechanisms resHybrid lead halide perovskites emerged at the beginning of 2010s decade as one of the most promising materials for photovoltaic applications. Easy and low-cost solution-based fabrication processes can be used, obtaining perovskite solar cells (PSCs) with efficiencies above 20%. However, there still are some major issues to overcome, like stability, and the general understanding of the recombination mechanisms results particularly puzzling. In this chapter, an analysis is provided on most recent research results about the different mechanisms, location and relationships of charge carrier recombination in PSCs. After introducing the theoretical framework, including the main transport equations and relations with luminescence techniques, the radiative and non-radiative natures of recombination are commented and compared in terms of main contributions. Also, the effects of changing the perovskite composition and morphology are surveyed. The location of the recombination processes, whether in the bulk material or towards the interface, are tackled, as well as related features with the current-voltage hysteresis. On the latter, and along the complete chapter, the dual ionic-electronic conductivity of hybrid lead halide perovskites is particularly attended. ults particularly puzzling. In this chapter, an analysis is provided on most recent research results about the different mechanisms, location and relationships of charge carrier recombination in PSCs. After introducing the theoretical framework, including the main transport equations and relations with luminescence techniques, the radiative and non-radiative natures of recombination are commented and compared in terms of main contributions. Also, the effects of changing the perovskite composition and morphology are surveyed. The location of the recombination processes, whether in the bulk material or towards the interface, are tackled, as well as related features with the current-voltage hysteresis. On the latter, and along the complete chapter, the dual ionic-electronic conductivity of hybrid lead halide perovskites is particularly attended. ybrid lead halide perovskites emerged at the beginning of 2010s decade as one of the most promising materials for photovoltaic applications. Easy and low-cost solution-based fabrication processes can be used, obtaining perovskite solar cells (PSCs) with efficiencies above 20%. However, there still are some major issues to overcome, like stability, and the general understanding of the recombination mechanisms results particularly puzzling. In this chapter, an analysis is provided on most recent research results about the different mechanisms, location and relationships of charge carrier recombination in PSCs. After introducing the theoretical framework, including the main transport equations and relations with luminescence techniques, the radiative and non-radiative natures of recombination are commented and compared in terms of main contributions. Also, the effects of changing the perovskite composition and morphology are surveyed. The location of the recombination processes, whether in the bulk material or towards the interface, are tackled, as well as related features with the current-voltage hysteresis. On the latter, and along the complete chapter, the dual ionic-electronic conductivity of hybrid lead halide perovskites is particularly attended.

scholarly journals Are Shockley-Read-Hall and ABC models valid for lead halide perovskites?

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Alexander Kiligaridis ◽  
Pavel A. Frantsuzov ◽  
Aymen Yangui ◽  
Sudipta Seth ◽  
Jun Li ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Auger Recombination ◽  
Mapping Technique ◽  
Decay Kinetics ◽  
Advanced Technique ◽  
Charge Carrier Dynamics ◽  
Carrier Recombination ◽  
Halide Perovskites ◽  
Charge Carrier Recombination ◽  
Lead Halide

AbstractMetal halide perovskites are an important class of emerging semiconductors. Their charge carrier dynamics is poorly understood due to limited knowledge of defect physics and charge carrier recombination mechanisms. Nevertheless, classical ABC and Shockley-Read-Hall (SRH) models are ubiquitously applied to perovskites without considering their validity. Herein, an advanced technique mapping photoluminescence quantum yield (PLQY) as a function of both the excitation pulse energy and repetition frequency is developed and employed to examine the validity of these models. While ABC and SRH fail to explain the charge dynamics in a broad range of conditions, the addition of Auger recombination and trapping to the SRH model enables a quantitative fitting of PLQY maps and low-power PL decay kinetics, and extracting trap concentrations and efficacies. However, PL kinetics at high power are too fast and cannot be explained. The proposed PLQY mapping technique is ideal for a comprehensive testing of theories and applicable to any semiconductor.

scholarly journals Charge-Carrier Recombination in Halide Perovskites

2019 ◽  
Vol 119 (20) ◽  
pp. 11007-11019 ◽  
Author(s):  
Dane W. deQuilettes ◽  
Kyle Frohna ◽  
David Emin ◽  
Thomas Kirchartz ◽  
Vladimir Bulovic ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Carrier Recombination ◽  
Halide Perovskites ◽  
Charge Carrier Recombination

Defect trapping states and charge carrier recombination in organic–inorganic halide perovskites

2016 ◽  
Vol 4 (4) ◽  
pp. 793-800 ◽  
Author(s):  
Xiaoming Wen ◽  
Yu Feng ◽  
Shujuan Huang ◽  
Fuzhi Huang ◽  
Yi-Bing Cheng ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Relaxation Rate ◽  
Defect Density ◽  
Linear Increase ◽  
Carrier Recombination ◽  
Halide Perovskites ◽  
Charge Carrier Recombination ◽  
Pl Intensity ◽  
Recombination Dynamics

The defect density and relaxation rate in organic–inorganic perovskites dominate the carrier recombination dynamics and thus PL intensity exhibits super-linear increase with increasing excitation.

Lead-Free Metal Halide Perovskite Nanocrystals for Photocatalysis in Water

2019 ◽  
Author(s):  
Subhajit Bhattacharjee ◽  
Sonu Pratap Chaudhary ◽  
Sayan Bhattacharyya
Keyword(s):  
Charge Carrier ◽  
Wide Spectrum ◽  
Real Life ◽  
Metal Halide ◽  
Lead Free ◽  
Water Medium ◽  
Type I ◽  
Type Ii ◽  
Perovskite Layer ◽  
Halide Perovskites

<p>Metal halide perovskites with high absorption coefficient, direct generation of free charge carriers, excellent ambipolar charge carrier transport properties, point-defect tolerance, compositional versatility and solution processability are potentially transforming the photovoltaics and optoelectronics industries. However their limited ambient stability, particularly those of iodide perovskites, obscures their use as photocatalysts especially in aqueous medium. In an unprecedented approach we have exploited the photo-absorption property of the less toxic lead-free Cs<sub>3</sub>Bi<sub>2</sub>X<sub>9 </sub>(X = Br, I) nanocrystals (NCs) to catalyse the degradation of water pollutant organic dye, methylene blue (MB) in presence of visible light at room temperature. After providing a proof-of-concept with bromide perovskites in isopropanol, the perovskites are employed as photocatalysts in water medium by designing perovskite/Ag<sub>2</sub>S and perovskite/TiO<sub>2 </sub>composite systems, with Type I (or quasi Type II) and Type II alignments, respectively. Ag<sub>2</sub>S and TiO<sub>2</sub> coatings decelerate penetration of water into the perovskite layer while facilitating charge carrier extraction. With a minimal NC loading, Cs<sub>3</sub>Bi<sub>2</sub>I<sub>9</sub>/Ag<sub>2</sub>S degrades ~90% MB within an hour. Our approach has the potential to unravel the photocatalytic properties of metal halide perovskites for a wide spectrum of real-life applications. </p>

Efficient Defect Passivation with Niacin for High-Performance and Stable Perovskite Solar Cells

2021 ◽  
Author(s):  
Jing Ren ◽  
Shurong Wang ◽  
Jianxing Xia ◽  
Chengbo Li ◽  
Lisha Xie ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Carrier ◽  
High Performance ◽  
Perovskite Solar Cells ◽  
Trap States ◽  
Carrier Recombination ◽  
Defect Passivation ◽  
Recombination Centers ◽  
Charge Carrier Recombination ◽  
Halide Perovskite

Defects, inevitably produced in the solution-processed halide perovskite films, can act as charge carrier recombination centers to induce severe energy loss in perovskite solar cells (PSCs). Suppressing these trap states...

Time-dependent Langevin-type bimolecular charge carrier recombination in regiorandom poly(3-hexylthiophene)

2005 ◽  
Vol 155 (2) ◽  
pp. 242-245 ◽  
Author(s):  
A. Pivrikas ◽  
R. Österbacka ◽  
G. Juška ◽  
K. Arlauskas ◽  
H. Stubb
Keyword(s):  
Charge Carrier ◽  
Time Dependent ◽  
Carrier Recombination ◽  
Charge Carrier Recombination
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