scholarly journals Impacts of carrier trapping and ion migration on charge transport of perovskite solar cells with TiOx electron transport layer

RSC Advances ◽  
2020 ◽  
Vol 10 (47) ◽  
pp. 28083-28089
Author(s):  
Ling Li ◽  
Pengcheng Jia ◽  
Wentao Bi ◽  
Yang Tang ◽  
Bo Song ◽  
...  
Keyword(s):  
Electron Transport ◽  
Charge Transport ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Ion Migration ◽  
Dynamic Distribution ◽  
Carrier Trapping ◽  
Charge Dynamic ◽  
Perovskite Materials

The ion migration in perovskite materials has been extensively studied by researchers, but the charge dynamic distribution caused by ion migration and carrier trapping is partly unclear.

scholarly journals High-Performance and Hysteresis-Free Perovskite Solar Cells Based on Rare-Earth-Doped SnO2 Mesoporous Scaffold

Research ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Qiyao Guo ◽  
Jihuai Wu ◽  
Yuqian Yang ◽  
Xuping Liu ◽  
Zhang Lan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Rare Earth ◽  
Electron Transport ◽  
Charge Transport ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Rare Earth Doping ◽  
Perovskite Layer

Tin oxide (SnO2), as electron transport material to substitute titanium oxide (TiO2) in perovskite solar cells (PSCs), has aroused wide interests. However, the performance of the PSCs based on SnO2 is still hard to compete with the TiO2-based devices. Herein, a novel strategy is designed to enhance the photovoltaic performance and long-term stability of PSCs by integrating rare-earth ions Ln3+ (Sc3+, Y3+, La3+) with SnO2 nanospheres as mesoporous scaffold. The doping of Ln promotes the formation of dense and large-sized perovskite crystals, which facilitate interfacial contact of electron transport layer/perovskite layer and improve charge transport dynamics. Ln dopant optimizes the energy level of perovskite layer, reduces the charge transport resistance, and mitigates the trap state density. As a result, the optimized mesoporous PSC achieves a champion power conversion efficiency (PCE) of 20.63% without hysteresis, while the undoped PSC obtains an efficiency of 19.01%. The investigation demonstrates that the rare-earth doping is low-cost and effective method to improve the photovoltaic performance of SnO2-based PSCs.

scholarly journals Nanoscale localized contacts for high fill factors in polymer-passivated perovskite solar cells

Science ◽  
2021 ◽  
Vol 371 (6527) ◽  
pp. 390-395
Author(s):  
Jun Peng ◽  
Daniel Walter ◽  
Yuhao Ren ◽  
Mike Tebyetekerwa ◽  
Yiliang Wu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Charge Transport ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Hole Transport Layer ◽  
Free Hole ◽  
Trade Off

Polymer passivation layers can improve the open-circuit voltage of perovskite solar cells when inserted at the perovskite–charge transport layer interfaces. Unfortunately, many such layers are poor conductors, leading to a trade-off between passivation quality (voltage) and series resistance (fill factor, FF). Here, we introduce a nanopatterned electron transport layer that overcomes this trade-off by modifying the spatial distribution of the passivation layer to form nanoscale localized charge transport pathways through an otherwise passivated interface, thereby providing both effective passivation and excellent charge extraction. By combining the nanopatterned electron transport layer with a dopant-free hole transport layer, we achieved a certified power conversion efficiency of 21.6% for a 1-square-centimeter cell with FF of 0.839, and demonstrate an encapsulated cell that retains ~91.7% of its initial efficiency after 1000 hours of damp heat exposure.

scholarly journals Ultrathin and compact electron transport layer made from novel water-dispersed Fe3O4 nanoparticles to accomplish UV-stable perovskite solar cells

2021 ◽  
Author(s):  
Song Fang ◽  
Bo Chen ◽  
Bangkai Gu ◽  
Linxing Meng ◽  
Hao Lu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Electron Transport ◽  
Perovskite Solar Cells ◽  
Perovskite Solar Cell ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Perovskite Material ◽  
Main Factors ◽  
Induced Decomposition

UV induced decomposition of perovskite material is one of main factors to severely destroy perovskite solar cells for instability. Here we report a UV stable perovskite solar cell with a...

scholarly journals The Influence of the Thickness of Compact TiO2 Electron Transport Layer on the Performance of Planar CH3NH3PbI3 Perovskite Solar Cells

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3295
Author(s):  
Andrzej Sławek ◽  
Zbigniew Starowicz ◽  
Marek Lipiński
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Short Circuit ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Precursor Solution ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Transport Layer ◽  
Electron Transport Layer

In recent years, lead halide perovskites have attracted considerable attention from the scientific community due to their exceptional properties and fast-growing enhancement for solar energy harvesting efficiency. One of the fundamental aspects of the architecture of perovskite-based solar cells (PSCs) is the electron transport layer (ETL), which also acts as a barrier for holes. In this work, the influence of compact TiO2 ETL on the performance of planar heterojunction solar cells based on CH3NH3PbI3 perovskite was investigated. ETLs were deposited on fluorine-doped tin oxide (FTO) substrates from a titanium diisopropoxide bis(acetylacetonate) precursor solution using the spin-coating method with changing precursor concentration and centrifugation speed. It was found that the thickness and continuity of ETLs, investigated between 0 and 124 nm, strongly affect the photovoltaic performance of PSCs, in particular short-circuit current density (JSC). Optical and topographic properties of the compact TiO2 layers were investigated as well.

Electron-transport-layer-free two-dimensional perovskite solar cells based on a flexible poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) cathode

2021 ◽  
Author(s):  
Zhihai Liu ◽  
Lei Wang ◽  
Chongyang Xu ◽  
Xiaoyin Xie
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Two Dimensional ◽  
High Power Conversion Efficiency ◽  
Long Term Stability

Recently, Ruddlesden–Popper two-dimensional (2D) perovskite solar cells (PSCs) have been intensively studied, owing to their high power conversion efficiency (PCE) and excellent long-term stability. In this work, we fabricated electron-transport-layer-free...

scholarly journals Magnesium doped TiO2 as an efficient electron transport layer in perovskite solar cells

2021 ◽  
pp. 101101
Author(s):  
Zafar Arshad ◽  
Asif Hussain Khoja ◽  
Sehar Shakir ◽  
Asif Afzal ◽  
M.A. Mujtaba ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Doped Tio2

scholarly journals Low-temperature-processed metal oxide electron transport layers for efficient planar perovskite solar cells

Rare Metals ◽  
2021 ◽  
Author(s):  
Jia-Xing Song ◽  
Xin-Xing Yin ◽  
Zai-Fang Li ◽  
Yao-Wen Li
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Low Temperature ◽  
Metal Oxide ◽  
Low Cost ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Future Research ◽  
Low Temperature Preparation

Abstract As a promising photovoltaic technology, perovskite solar cells (pero-SCs) have developed rapidly over the past few years and the highest power conversion efficiency is beyond 25%. Nowadays, the planar structure is universally popular in pero-SCs due to the simple processing technology and low-temperature preparation. Electron transport layer (ETL) is verified to play a vital role in the device performance of planar pero-SCs. Particularly, the metal oxide (MO) ETL with low-cost, superb versatility, and excellent optoelectronic properties has been widely studied. This review mainly focuses on recent developments in the use of low-temperature-processed MO ETLs for planar pero-SCs. The optical and electronic properties of widely used MO materials of TiO2, ZnO, and SnO2, as well as the optimizations of these MO ETLs are briefly introduced. The commonly used methods for depositing MO ETLs are also discussed. Then, the applications of different MO ETLs on pero-SCs are reviewed. Finally, the challenge and future research of MO-based ETLs toward practical application of efficient planar pero-SCs are proposed. Graphical abstract

scholarly journals Dip coated SnO2 film as electron transport layer for low temperature processed planar perovskite solar cells

2021 ◽  
Vol 4 ◽  
pp. 100066
Author(s):  
A. Ashina ◽  
Ramya Krishna Battula ◽  
Easwaramoorthi Ramasamy ◽  
Narendra Chundi ◽  
S. Sakthivel ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Low Temperature ◽  
Perovskite Solar Cells ◽  
Sno2 Film ◽  
Transport Layer ◽  
Electron Transport Layer
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