Nuclei position-control and crystal growth-guidance on frozen substrates for high-performance perovskite solar cells

Nanoscale ◽  
2019 ◽  
Vol 11 (25) ◽  
pp. 12108-12115 ◽  
Author(s):  
Gang Wang ◽  
Liping Liao ◽  
Lianbin Niu ◽  
Lijia Chen ◽  
Wenjun Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Crystal Growth ◽  
Spin Coating ◽  
High Performance ◽  
High Efficiency ◽  
Position Control ◽  
Perovskite Solar Cells ◽  
Growth Guidance

High-efficiency p–i–n perovskite solar cells with 1.14 V Voc by spin-coating perovskite films on frozen substrates.

scholarly journals Iodine reduction for reproducible and high-performance perovskite solar cells and modules

2021 ◽  
Vol 7 (10) ◽  
pp. eabe8130
Author(s):  
Shangshang Chen ◽  
Xun Xiao ◽  
Hangyu Gu ◽  
Jinsong Huang
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
High Efficiency ◽  
Electronic Materials ◽  
Substantial Reduction ◽  
Perovskite Solar Cells ◽  
High Yield ◽  
Operation Conditions ◽  
Record Value ◽  
Precursor Powders

Perovskite-based electronic materials and devices such as perovskite solar cells (PSCs) have notoriously bad reproducibility, which greatly impedes both fundamental understanding of their intrinsic properties and real-world applications. Here, we report that organic iodide perovskite precursors can be oxidized to I2 even for carefully sealed precursor powders or solutions, which markedly deteriorates the performance and reproducibility of PSCs. Adding benzylhydrazine hydrochloride (BHC) as a reductant into degraded precursor solutions can effectively reduce the detrimental I2 back to I−, accompanied by a substantial reduction of I3−-induced charge traps in the films. BHC residuals in perovskite films further stabilize the PSCs under operation conditions. BHC improves the stabilized efficiency of the blade-coated p-i-n structure PSCs to a record value of 23.2% (22.62 ± 0.40% certified by National Renewable Energy Laboratory), and the high-efficiency devices have a very high yield. A stabilized aperture efficiency of 18.2% is also achieved on a 35.8-cm2 mini-module.

Enhanced Grain Size and Crystallinity in CH3NH3PbI3 Perovskite Films by Metal Additives to the Single-Step Solution Fabrication Process

MRS Advances ◽  
2018 ◽  
Vol 3 (55) ◽  
pp. 3237-3242 ◽  
Author(s):  
Zahrah S. Almutawah ◽  
Suneth C. Watthage ◽  
Zhaoning Song ◽  
Ramez H. Ahangharnejhad ◽  
Kamala K. Subedi ◽  
...  
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
High Performance ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Precursor Solution ◽  
Single Step ◽  
Fabrication Process ◽  
Lead Iodide ◽  
Methylammonium Lead Iodide

ABSTRACTMethods of obtaining large grain size and high crystallinity in absorber materials play an important role in fabrication of high-performance methylammonium lead iodide (MAPbI3) perovskite solar cells. Here we study the effect of adding small concentrations of Cd2+, Zn2+, and Fe2+salts to the perovskite precursor solution used in the single-step solution fabrication process. Enhanced grain size and crystallinity in MAPbI3 films were obtained by using 0.1% of Cd2+ or Zn2+in the precursor solution. Consequently, solar cells constructed with Cd- and Zn-doped perovskite films show a significant improvement in device performance. These results suggest that the process may be an effective and facile method to fabricate high-efficiency perovskite photovoltaic devices.

Pathways toward high-performance inorganic perovskite solar cells: challenges and strategies

2019 ◽  
Vol 7 (36) ◽  
pp. 20494-20518 ◽  
Author(s):  
Bo Li ◽  
Lin Fu ◽  
Shuang Li ◽  
Hui Li ◽  
Lu Pan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Energy ◽  
High Performance ◽  
High Efficiency ◽  
Low Cost ◽  
Perovskite Solar Cells ◽  
Inorganic Perovskite ◽  
Challenges And Strategies

High-efficiency and low-cost perovskite solar cells (PSCs) are desirable candidates for addressing the scalability challenge of renewable solar energy.

Low-temperature interfacial engineering for flexible CsPbI2Br perovskite solar cells with high performance beyond 15%

2020 ◽  
Vol 8 (10) ◽  
pp. 5308-5314 ◽  
Author(s):  
Xia Yang ◽  
Hanjun Yang ◽  
Xiaotian Hu ◽  
Wenting Li ◽  
Zhimin Fang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Low Temperature ◽  
High Performance ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Interfacial Engineering ◽  
Doped Zno

High-efficiency flexible CsPbI2Br PSCs are designed by introducing Al-doped ZnO as an electron-transport layer and tert-butyl cyanoacetate as a hole passivation layer. The optimized PSC exhibits outstanding stability and a champion PCE of 15.08%.

A review: crystal growth for high-performance all-inorganic perovskite solar cells

2020 ◽  
Vol 13 (7) ◽  
pp. 1971-1996 ◽  
Author(s):  
Weijie Chen ◽  
Xinqi Li ◽  
Yaowen Li ◽  
Yongfang Li
Keyword(s):  
Solar Cells ◽  
Crystal Growth ◽  
High Performance ◽  
Perovskite Solar Cells ◽  
Key Factors ◽  
High Quality ◽  
Inorganic Perovskite ◽  
Perovskite Crystal

The key factors for high-quality all-inorganic perovskite crystal growth.

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 Efficient Ag-Doped Perovskite Solar Cells Fabricated in Ambient Air

Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1521
Author(s):  
Jiabin Hao ◽  
Zeming Wang ◽  
Huiying Hao ◽  
Guanlei Wang ◽  
Hongcheng Gao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Spin Coating ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Ambient Air ◽  
Nucleation Density ◽  
Perovskite Material ◽  
Coating Method ◽  
One Step ◽  
Improved Performance

So far, it is still a great challenge to prepare high efficiency organic–inorganic perovskite solar cells in ambient air. Specifically, moisture is easily combined with the perovskite material during the spin-coating process, which result in porous perovskite films with poor surface morphology. In this study, we investigated crystalline Ag-doped perovskite films by a one-step spin-coating method in air with 30–40% relative humidity (RH), in which ethyl acetate (EA) was used as antisolvent can absorb moisture in air to reduced nucleation density. More significantly, EA is a feasible and environmentally friendly solvent to replace highly toxic solvent. Moreover, 1.0% Ag-doped device shows a highest power conversion efficiency (PCE) of 14.36%. The improved performance is not only ascribed to the superior CH3NH3PbI3 film with high crystallinity but to the versatile tunability of energy band structure.

scholarly journals Strategies for High-Performance Large-Area Perovskite Solar Cells toward Commercialization

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 295
Author(s):  
Tianzhao Dai ◽  
Qiaojun Cao ◽  
Lifeng Yang ◽  
Mahmoud Aldamasy ◽  
Meng Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Large Scale ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Growth Control ◽  
Single Crystal Silicon ◽  
Large Area ◽  
Crystal Silicon ◽  
Control Interface

Perovskite solar cells (PSCs) have received a great deal of attention in the science and technology field due to their outstanding power conversion efficiency (PCE), which increased rapidly from 3.9% to 25.5% in less than a decade, comparable to single crystal silicon solar cells. In the past ten years, much progress has been made, e.g. impressive ideas and advanced technologies have been proposed to enlarge PSC efficiency and stability. However, this outstanding progress has always been referred to as small-area (<0.1 cm2) PSCs. Little attention has been paid to the preparation processes and their micro-mechanisms for large-area (>1 cm2) PSCs. Meanwhile, scaling up is an inevitable way for large-scale application of PSCs. Therefore, we firstly summarize the current achievements for high efficiency and stability large-area perovskite solar cells, including precursor composition, deposition, growth control, interface engineering, packaging technology, etc. Then we include a brief discussion and outlook for the future development of large-area PSCs in commercialization.

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