Guanidinium doping enabled low-temperature fabrication of high-efficiency all-inorganic CsPbI2Br perovskite solar cells

2019 ◽  
Vol 7 (48) ◽  
pp. 27640-27647 ◽  
Author(s):  
Junjie Ma ◽  
Minchao Qin ◽  
Yuhao Li ◽  
Tiankai Zhang ◽  
Jianbin Xu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Low Temperature ◽  
Crystallization Process ◽  
High Efficiency ◽  
Perovskite Solar Cells

Efficient guanidinium-doped CsPbI2Br PSCs were fabricated at a low temperature. In situ GIWAXS measurements were performed to understand the crystallization process.

scholarly journals In-situ formed and low-temperature deposited Nb: TiO2 compact-mesoporous layer for hysteresis-less perovskite solar cells with high performance

2020 ◽  
Author(s):  
Miao Yu ◽  
Haoxuan Sun ◽  
Xiaona Huang ◽  
Yichao Yan ◽  
Wanli Zhang
Keyword(s):  
Solar Cells ◽  
Low Temperature ◽  
High Performance ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
High Power Conversion Efficiency ◽  
Mesoporous Structures

Abstract Recently, reported perovskite solar cells (PSCs) with high power conversion efficiency (PCE) are mostly based on mesoporous structures containing mesoporous titanium oxide (TiO 2 ) which is the main factor to reduce the overall hysteresis. However, existing fabrication approaches for mesoporous TiO 2 generally require a high temperature (>450 °C) annealing process. Moreover, there is still plenty of scope for improvement in terms of increasing the electron conductivity and reducing the carrier recombination. Herein, a facile one-step, in situ and low-temperature method was developed to prepare an Nb:TiO 2 compact-mesoporous layer to serve as both a scaffold and an electron transport layer (ETL) in PSCs. The Nb:TiO 2 compact-mesoporous layer based PSCs exhibit suppressed hysteresis, which is attributed to the synergistic effect of the large interface surface area caused by nano-pin morphology on the surface and the improved carrier transportation caused by the presence of Nb. Such a high-quality compact-mesoporous layer allows the PSC achieve a remarkable PCE of 19.74%. This work promises an effective approach for creating hysteresis-less and high-efficiency PSCs based on compact-mesoporous structures with lower energy consumption and cost.

scholarly journals In-situ formed and low-temperature deposited Nb: TiO2 compact-mesoporous layer for hysteresis-less perovskite solar cells with high performance

2020 ◽  
Author(s):  
Miao Yu ◽  
Haoxuan Sun ◽  
Xiaona Huang ◽  
Yichao Yan ◽  
Wanli Zhang
Keyword(s):  
Solar Cells ◽  
Low Temperature ◽  
High Performance ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
High Power Conversion Efficiency ◽  
Mesoporous Structures

Abstract Recently, reported perovskite solar cells (PSCs) with high power conversion efficiency (PCE) are mostly based on mesoporous structures containing mesoporous titanium oxide (TiO2 ) which is the main factor to reduce the overall hysteresis. However, existing fabrication approaches for mesoporous TiO2 generally require a high temperature annealing process. Moreover, there is still a long way to go for improvement in terms of increasing the electron conductivity and reducing the carrier recombination. Herein, a facile one-step, in situ and low-temperature method was developed to prepare an Nb: TiO2 compact-mesoporous layer to serve as both scaffold and electron transport layer (ETL) in PSCs. The Nb: TiO2 compact-mesoporous ETL based PSCs exhibit suppressed hysteresis, which is attributed to the synergistic effect of the large interface surface area caused by nano-pin morphology and the improved carrier transportation caused by Nb doping. Such a high-quality compact-mesoporous layer allows the PSC to achieve a remarkable PCE of 19.74%. This work promises an effective approach for creating hysteresis-less and high-efficiency PSCs based on compact-mesoporous structures with lower energy consumption and cost.

scholarly journals Effect of SnO2 Colloidal Dispersion Solution Concentration on the Quality of Perovskite Layer of Solar Cells

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 591
Author(s):  
Keke Song ◽  
Xiaoping Zou ◽  
Huiyin Zhang ◽  
Chunqian Zhang ◽  
Jin Cheng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Low Temperature ◽  
High Efficiency ◽  
Surface Condition ◽  
Perovskite Solar Cells ◽  
Colloidal Dispersion ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Perovskite Layer ◽  
Dispersion Solution

The electron transport layer (ETL) is critical to carrier extraction for perovskite solar cells (PSCs). Moreover, the morphology and surface condition of the ETL could influence the topography of the perovskite layer. ZnO, TiO2, and SnO2 were widely investigated as ETL materials. However, TiO2 requires a sintering process under high temperature and ZnO has the trouble of chemical instability. SnO2 possesses the advantages of low-temperature fabrication and high conductivity, which is critical to the performance of PSCs prepared under low temperature. Here, we optimized the morphology and property of SnO2 by modulating the concentration of a SnO2 colloidal dispersion solution. When adjusting the concentration of SnO2 colloidal dispersion solution to 5 wt.% (in water), SnO2 film indicated better performance and the perovskite film has a large grain size and smooth surface. Based on high efficiency (16.82%), the device keeps a low hysteresis index (0.23).

High-Efficiency Low-Temperature ZnO Based Perovskite Solar Cells Based on Highly Polar, Nonwetting Self-Assembled Molecular Layers

2017 ◽  
Vol 8 (5) ◽  
pp. 1701683 ◽  
Author(s):  
Randi Azmi ◽  
Wisnu Tantyo Hadmojo ◽  
Septy Sinaga ◽  
Chang-Lyoul Lee ◽  
Sung Cheol Yoon ◽  
...  
Keyword(s):  
Solar Cells ◽  
Low Temperature ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Self Assembled ◽  
Molecular Layers

Scalable Processing of Low-Temperature TiO2 Nanoparticles for High-Efficiency Perovskite Solar Cells

2018 ◽  
Vol 2 (1) ◽  
pp. 47-58 ◽  
Author(s):  
Ihteaz M. Hossain ◽  
Damien Hudry ◽  
Florian Mathies ◽  
Tobias Abzieher ◽  
Somayeh Moghadamzadeh ◽  
...  
Keyword(s):  
Solar Cells ◽  
Low Temperature ◽  
Tio2 Nanoparticles ◽  
High Efficiency ◽  
Perovskite Solar Cells

High Efficiency Low-Temperature Processed Perovskite Solar Cells Integrated with Alkali Metal Doped ZnO Electron Transport Layers

2018 ◽  
Vol 3 (6) ◽  
pp. 1241-1246 ◽  
Author(s):  
Randi Azmi ◽  
Sunbin Hwang ◽  
Wenping Yin ◽  
Tae-Wook Kim ◽  
Tae Kyu Ahn ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Low Temperature ◽  
Alkali Metal ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Doped Zno ◽  
Metal Doped
Sign in / Sign up

Export Citation Format

Share Document