Grain size control for high-performance formamidinium-based perovskite solar cells via suppressing heterogenous nucleation

2021 ◽  
Vol 9 (1) ◽  
pp. 208-213
Author(s):  
Xiaoxiao Xu ◽  
Yuhai Sun ◽  
Dingchao He ◽  
Zheng Liang ◽  
Guozhen Liu ◽  
...  
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
Homogeneous Nucleation ◽  
High Performance ◽  
Defect Density ◽  
Perovskite Solar Cells ◽  
Size Control ◽  
Precursor Solution ◽  
Grain Size Control ◽  
Heterogenous Nucleation

By introducing ED and TAP into precursor solution, homogeneous nucleation is encouraged to occur and films with large grain size and lower defect density were obtained.

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.

Semiconducting carbon nanotubes as crystal growth templates and grain bridges in perovskite solar cells

2019 ◽  
Vol 7 (21) ◽  
pp. 12987-12992 ◽  
Author(s):  
Seungju Seo ◽  
Il Jeon ◽  
Rong Xiang ◽  
Changsoo Lee ◽  
Hao Zhang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Grain Size ◽  
Solar Cells ◽  
Crystal Growth ◽  
Perovskite Solar Cells ◽  
Size Control ◽  
Grain Size Control

Grain size control and boundary passivation of perovskite films are the key to obtaining efficient perovskite solar cells.

scholarly journals Ambient Air Temperature Assisted Crystallization for Inorganic CsPbI2Br Perovskite Solar Cells

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3398
Author(s):  
Yi Long ◽  
Kun Liu ◽  
Yongli Zhang ◽  
Wenzhe Li
Keyword(s):  
Solar Cells ◽  
Air Temperature ◽  
High Performance ◽  
Defect Density ◽  
Perovskite Solar Cells ◽  
Ambient Air ◽  
Dark Phase ◽  
High Quality ◽  
Ambient Air Temperature ◽  
Air Atmosphere

Inorganic cesium lead halide perovskites, as alternative light absorbers for organic–inorganic hybrid perovskite solar cells, have attracted more and more attention due to their superb thermal stability for photovoltaic applications. However, the humid air instability of CsPbI2Br perovskite solar cells (PSCs) hinders their further development. The optoelectronic properties of CsPbI2Br films are closely related to the quality of films, so preparing high-quality perovskite films is crucial for fabricating high-performance PSCs. For the first time, we demonstrate that the regulation of ambient temperature of the dry air in the glovebox is able to control the growth of CsPbI2Br crystals and further optimize the morphology of CsPbI2Br film. Through controlling the ambient air temperature assisted crystallization, high-quality CsPbI2Br films are obtained, with advantages such as larger crystalline grains, negligible crystal boundaries, absence of pinholes, lower defect density, and faster carrier mobility. Accordingly, the PSCs based on as-prepared CsPbI2Br film achieve a power conversion efficiency of 15.5% (the maximum stabilized power output of 15.02%). Moreover, the optimized CsPbI2Br films show excellent robustness against moisture and oxygen and maintain the photovoltaic dark phase after 3 h aging in an air atmosphere at room temperature and 35% relative humidity (R.H.). In comparison, the pristine films are completely converted to the yellow phase in 1.5 h.

Analysis and Control of the Performance-Limiting Defects in HEM-Grown Silicon for Solar Cells

1995 ◽  
Vol 378 ◽  
Author(s):  
Chandra P. Khattak ◽  
Frederick Schmid ◽  
Michael Cudzinovic ◽  
Martha Symko ◽  
Bhushan L. Sopori
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
Heat Exchanger ◽  
Grain Boundaries ◽  
Cross Section ◽  
High Performance ◽  
Defect Density ◽  
Growth Features ◽  
And Control ◽  
Metallic Impurities

AbstractMulticrystalline silicon ingots of 55 cm × 55 cm cross section, 100 kg have been grown by the Heat Exchanger Method (HEM). Controlled growth features have been used to produce large grain size, vertically oriented grain boundaries, large areas of twins with low defect density and rejection of impurities to the top of the ingot. Ambient control has reduced C, N, and O concentration and minimized precipitates with no detectable metallic impurities. High performance solar cells have ben fabricated, and further improvements can be achieved by minimizing dislocation tangles and impurities in localized regions.

Enhancing the grain size of organic halide perovskites by sulfonate-carbon nanotube incorporation in high performance perovskite solar cells

2016 ◽  
Vol 52 (33) ◽  
pp. 5674-5677 ◽  
Author(s):  
Yong Zhang ◽  
Licheng Tan ◽  
Qingxia Fu ◽  
Lie Chen ◽  
Ting Ji ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Grain Size ◽  
Solar Cells ◽  
Carbon Nanotube ◽  
Grain Boundary ◽  
High Performance ◽  
Perovskite Solar Cells ◽  
Organic Halide ◽  
Halide Perovskites

Perovskite films with enhanced grain size and reduced grain boundary were obtained with the incorporation of sulfonate-carbon nanotubes.

scholarly journals Optimization of grain size to achieve high-performance perovskite solar cells in vapor deposition

2019 ◽  
Vol 68 (7) ◽  
pp. 078801
Author(s):  
Bu-Jun Wu ◽  
Dong-Xu Lin ◽  
Zheng Li ◽  
Zhen-Ping Cheng ◽  
Xin Li ◽  
...  
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
Vapor Deposition ◽  
High Performance ◽  
Perovskite Solar Cells

High-Performance Perovskite Solar Cells with Large Grain-Size obtained by using the Lewis Acid-Base Adduct of Thiourea

Solar RRL ◽  
2018 ◽  
Vol 2 (6) ◽  
pp. 1800034 ◽  
Author(s):  
Shuo Wang ◽  
Zirui Ma ◽  
Beibei Liu ◽  
Wenchao Wu ◽  
Yu Zhu ◽  
...  
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
Lewis Acid ◽  
High Performance ◽  
Perovskite Solar Cells ◽  
Acid Base

scholarly journals Tuning Nucleation Sites to Enable Monolayer Perovskite Films for Highly Efficient Perovskite Solar Cells

Coatings ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 408 ◽  
Author(s):  
Yan Li ◽  
Xiaolei Li ◽  
Qianqian Chu ◽  
Hui Dong ◽  
Jiantao Yao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Heterogeneous Nucleation ◽  
Homogeneous Nucleation ◽  
Critical Role ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Precursor Solution ◽  
Full Coverage ◽  
Nucleation Sites ◽  
Incomplete Coverage

The nucleation site plays a critical role in achieving the full coverage of perovskite film at both the macroscopic and microscopic scales, and it is systematically investigated for the first time in this study. The results show that under natural conditions, the incomplete coverage of perovskite film is due to both heterogeneous nucleation and homogeneous nucleation. The established concentration field and temperature field in the precursor solution show that there are two preferential nucleation sites, i.e., the upper surface of the precursor solution (homogeneous nucleation) and the surface of the substrate (heterogeneous nucleation). The nucleation sites are tuned by decreasing the drying pressure from the atmosphere to 3000 Pa, and then to 100 Pa, and then the microstructures of the perovskite films change from an incomplete coverage state to a monolayer full coverage state, and then to a bilayer full coverage state. At last, when the full coverage perovskite films are assembled into perovskite solar cells, the photovoltaic performance of the monolayer perovskite solar cells is slightly greater than that of the bilayer perovskite solar cells. The electrochemical characterization shows that there is more restrained internal recombination of the monolayer perovskite solar cells compared with bilayer perovskite solar cells.

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