scholarly journals The Influence of the Relaxation Time on the Dynamic Hysteresis in Perovskite Solar Cells

2018 ◽  
Vol 173 ◽  
pp. 03017 ◽  
Author(s):  
Alexandra Palici ◽  
George Alexandru Nemnes ◽  
Cristina Besleaga ◽  
Lucian Pintilie ◽  
Dragos-Victor Anghel ◽  
...  
Keyword(s):  
Solar Cells ◽  
Relaxation Time ◽  
Dynamic Behavior ◽  
Perovskite Solar Cells ◽  
Time Interval ◽  
Electrical Model ◽  
Polarization Process ◽  
Dynamic Hysteresis ◽  
Scan Rate ◽  
Typical Range

We investigate the dynamic behavior of perovskite solar cells by focusing on the relaxation time τ, which corresponds to the slow de-polarization process from an initial bias pre-poled state. The dynamic electrical model (DEM) is employed for simulating the J-V characteristics for different bias scan rates and pre-poling conditions. Depending on the sign of the initial polarization normal or inverted hysteresis may be induced. For fixed pre-poling conditions, the relaxation time, in relation to the bias scan rate, governs the magnitude of the dynamic hysteresis. In the limit of large τ the hysteretic effects are vanishing for the typical range of bias scan rates considered, while for very small τ the hysteresis is significant only when it is comparable with the measurement time interval.

Surface Polarization Model for the Dynamic Hysteresis of Perovskite Solar Cells

2017 ◽  
Vol 8 (5) ◽  
pp. 915-921 ◽  
Author(s):  
Sandheep Ravishankar ◽  
Osbel Almora ◽  
Carlos Echeverría-Arrondo ◽  
Elnaz Ghahremanirad ◽  
Clara Aranda ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Polarization Model ◽  
Dynamic Hysteresis ◽  
Surface Polarization

scholarly journals Influences of Dielectric Constant and Scan Rate to Hysteresis Effect in Perovskite Solar Cell: Simulation and Experimental Analyses

2021 ◽  
Author(s):  
Jun-Yu Huang ◽  
You-Wei Yang ◽  
Wei-Hsuan Hsu ◽  
En-Wen Chang ◽  
Mei-Hsin Chen ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Hysteresis Phenomenon ◽  
Ion Density ◽  
Ion Migration ◽  
Hysteresis Behavior ◽  
Scan Rate ◽  
Cell Simulation

Abstract In this work, perovskite solar cells (PSCs) with different transport layers were fabricated to understand the hysteresis phenomenon under a series of scan rates. The experimental results show that the hysteresis phenomenon would be affected by the dielectric constant of transport layers and scan rate significantly. To explain this, a modified Poisson and drift-diffusion solver coupled with a fully time-dependent ion migration model is developed to analyze how the ion migration affects the performance and hysteresis of PSCs. The modeling results show that the most crucial factor in the hysteresis behavior is the built-in electric field of the perovskite. The non-linear hysteresis curves are demonstrated under different scan rates, and the mechanism of the hysteresis behavior is explained. Additionally, other factors contributing to the degree of hysteresis are determined to be the degree of degradation in the perovskite material, the quality of the perovskite crystal, and the materials of the transport layer, which corresponds to the total ion density, carrier lifetime of perovskite, and the dielectric constant of the transport layer, respectively. Finally, it was found that the dielectric constant of the transport layer is a key factor affecting hysteresis in perovskite solar cells.

Efficient promotion of charge separation and suppression of charge recombination by blending PCBM and its dimer as electron transport layer in inverted perovskite solar cells

RSC Advances ◽  
2016 ◽  
Vol 6 (113) ◽  
pp. 112512-112519 ◽  
Author(s):  
Jun Han ◽  
Hao-Yi Wang ◽  
Yi Wang ◽  
Man Yu ◽  
Shuai Yuan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Charge Carrier ◽  
Dynamic Behavior ◽  
Charge Separation ◽  
Perovskite Solar Cells ◽  
Charge Recombination ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Carrier Dynamic

Admixing PCBM and its dimer as electron transport material significantly improves charge carrier dynamic behavior in inverted perovskite device.

A thiourea additive-based quadruple cation lead halide perovskite with an ultra-large grain size for efficient perovskite solar cells

Nanoscale ◽  
2019 ◽  
Vol 11 (45) ◽  
pp. 21824-21833 ◽  
Author(s):  
Jyoti V. Patil ◽  
Sawanta S. Mali ◽  
Chang Kook Hong
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Inorganic Perovskite ◽  
Halide Perovskite ◽  
Lead Halide

Controlling the grain size of the organic–inorganic perovskite thin films using thiourea additives now crossing 2 μm size with >20% power conversion efficiency.

A new class of passivating molecules for perovskite solar cells: preliminary insights.

2020 ◽  
Author(s):  
Lucas Scalon ◽  
Francineide Lopes de Araújo ◽  
Caio Costa Oliveira ◽  
Ana Flávia Nogueira
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
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