Organic solvent vapor treatment of lead iodide layers in the two-step sequential deposition of CH3NH3PbI3-based perovskite solar cells

2016 ◽  
Vol 4 (5) ◽  
pp. 1947-1952 ◽  
Author(s):  
M. I. El-Henawey ◽  
Ryan S. Gebhardt ◽  
M. M. El-Tonsy ◽  
Sumit Chaudhary
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
Organic Solvent ◽  
Perovskite Solar Cells ◽  
Lead Iodide ◽  
Solvent Vapor ◽  
Sequential Deposition ◽  
Vapor Treatment

The two step sequential deposition of CH3NH3PbI3-based perovskite solar cells has been modified by applying toluene and chlorobenzene vapors during the preparation of PbI2 films leading to the growth of the PbI2 grain size.

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.

scholarly journals Improving the photovoltaic performance of planar heterojunction perovskite solar cells by mixed solvent vapor treatment

RSC Advances ◽  
2018 ◽  
Vol 8 (21) ◽  
pp. 11574-11579 ◽  
Author(s):  
Binbin Yuan ◽  
Suling Zhao ◽  
Zheng Xu ◽  
Dandan Song ◽  
Bo Qiao ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Solar Cells ◽  
Mixed Solvent ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Solvent Vapor ◽  
Planar Heterojunction ◽  
Vapor Treatment

The mixed solvent vapor treatment by the acetic acid with chlorobenzene (HAc/CB) improves the morphology and crystallization of CH3NH3PbI3 films.

scholarly journals A Modified Sequential Deposition Route for High-Performance Carbon-Based Perovskite Solar Cells under Atmosphere Condition

Molecules ◽  
2022 ◽  
Vol 27 (2) ◽  
pp. 481
Author(s):  
Jinyu Wu ◽  
Lei Zhang ◽  
Qiao Kang ◽  
Hongxi Shi ◽  
Long Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Counter Electrode ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Manufacturing Cost ◽  
Lead Iodide ◽  
Capping Layer ◽  
Sequential Deposition ◽  
Carbon Based

Carbon-based hole transport material (HTM)-free perovskite solar cells have exhibited a promising commercialization prospect, attributed to their outstanding stability and low manufacturing cost. However, the serious charge recombination at the interface of the carbon counter electrode and titanium dioxide (TiO2) suppresses the improvement in the carbon-based perovskite solar cells’ performance. Here, we propose a modified sequential deposition process in air, which introduces a mixed solvent to improve the morphology of lead iodide (PbI2) film. Combined with ethanol treatment, the preferred crystallization orientation of the PbI2 film is generated. This new deposition strategy can prepare a thick and compact methylammonium lead halide (MAPbI3) film under high-humidity conditions, which acts as a natural active layer that separates the carbon counter electrode and TiO2. Meanwhile, the modified sequential deposition method provides a simple way to facilitate the conversion of the ultrathick PbI2 capping layer to MAPbI3, as the light absorption layer. By adjusting the thickness of the MAPbI3 capping layer, we achieved a power conversation efficiency (PCE) of 12.5% for the carbon-based perovskite solar cells.

scholarly journals Modulating Surface Morphology Related to Crystallization Speed of Perovskite Grain and Semiconductor Properties of Optical Absorber Layer under Controlled Doping of Potassium Ions for Solar Cells

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1605 ◽  
Author(s):  
Tao Ling ◽  
Xiaoping Zou ◽  
Jin Cheng ◽  
Ying Yang ◽  
Haiyan Ren ◽  
...  
Keyword(s):  
Solar Cells ◽  
Surface Morphology ◽  
Perovskite Solar Cells ◽  
Lead Iodide ◽  
Solvent Vapor ◽  
Crystallization Properties ◽  
Component Design ◽  
Crystallization Speed ◽  
Controlled Doping ◽  
Semiconductor Properties

Perovskite thin films with excellent optical semiconductor and crystallization properties and superior surface morphology are normally considered to be vital to perovskite solar cells (PSCs). In this paper, we systematically survey the process of modulating surface morphology and optical semiconductor and crystallization properties of methylammonium lead iodide film by controlling doping of K+ for PSC prepared in air and propose the mechanism of large K+-doped perovskite grain formation related to crystallization speed. The increase in the crystallization speed leads to the production of large grains without localized-solvent-vapor (LSV) pores via moderate doping of K+, and the exorbitant crystallization speed induces super large grains with LSV pores via excessive doping of K+. Furthermore, the semiconductor properties (absorption band edge wavelength, PL emission peak wavelength, energy band gap) of perovskite film can be significantly tuned by controlled doping of K+. The investigation of the detailed process of modulating surface morphology and semiconductor properties of perovskite thin film by controlled doping of K+ may provide guidance and pave the way for superior component design of absorption materials for cost-efficient PSCs.

scholarly journals Organic solvent vapor sensitive methylammonium lead trihalide film formation for efficient hybrid perovskite solar cells

2015 ◽  
Vol 3 (17) ◽  
pp. 9146-9151 ◽  
Author(s):  
Jiarong Lian ◽  
Qi Wang ◽  
Yongbo Yuan ◽  
Yuchuan Shao ◽  
Jinsong Huang
Keyword(s):  
Solar Cells ◽  
Organic Solvent ◽  
Grain Orientation ◽  
Film Formation ◽  
Perovskite Solar Cells ◽  
Charge Recombination ◽  
Solvent Vapor ◽  
Hybrid Perovskite

Organic solvent vapor introduced during the formation of hybrid perovskite films changes the grain orientation and reduces charge recombination.

Improving the performance of lead acetate-based perovskite solar cells via solvent vapor annealing

CrystEngComm ◽  
2019 ◽  
Vol 21 (32) ◽  
pp. 4753-4762 ◽  
Author(s):  
Zhongli Guo ◽  
Jia Zhuang ◽  
Zhu Ma ◽  
Haoran Xia ◽  
Jing Yi ◽  
...  
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
Thermal Annealing ◽  
Lead Acetate ◽  
Perovskite Solar Cells ◽  
Annealing Process ◽  
Solvent Vapor ◽  
Vapor Annealing ◽  
Thermal Annealing Process ◽  
Solvent Vapor Annealing

The perovskite layers with large grain size and less pinhole were achieved by adding DMF during the thermal annealing process.

Improving Opto-Electronic Performance of Mixed-Cation Perovskite Solar Cells Through Surface-Treatment Strategy

2020 ◽  
Vol 12 (1) ◽  
pp. 62-68
Author(s):  
Danish Khan ◽  
Muhammad Mateen ◽  
Zulqarnain Arain ◽  
Manoj Kumar Panjwani ◽  
Jerry Kumar
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Film Surface ◽  
Cost Effective ◽  
Lead Iodide ◽  
Sem Images ◽  
Force Microscopy ◽  
Mean Grain Size ◽  
Electronic Performance

Among thin-film solar cells, perovskite solar cells are receiving close review by the researchers due to rapid increase in efficiency during the last decade. Mixed organic–inorganic halide perovskites (CH3NH3PbI3 or MAPbI3) are easy in fabrication as well as cost-effective but these solar cells are facing challenges of stability under normal environmental conditions. Halide perovskite solar cells (PSCs) are polycrystalline in nature but still lacking the effective optical and electrical properties, and one of the big reasons behind it is the less grain size. In this study, formamidinium lead iodide (FAI) treatment was applied along with deposition of MAPbI3. The grain size was increased which further decreased defects of film surface and grain boundary between the grains. The treatment also helped improving the crystallinity of films, as well as opto-electronic characteristics of PSCs. The FAI treated PSCs showed more resilience stability than untreated PSCs in terms of aged power conversion efficiency (PCE). The complete investigation was done by comparing the scanning electron microscope (SEM) images, atomic force microscopy (AFM) images, X-ray diffraction peaks, UV-Vis absorbance and mean grain size of the FAI treated and non-FAI treated films.

The synergistic effect of H2O and DMF towards stable and 20% efficiency inverted perovskite solar cells

2017 ◽  
Vol 10 (3) ◽  
pp. 808-817 ◽  
Author(s):  
Chien-Hung Chiang ◽  
Mohammad Khaja Nazeeruddin ◽  
Michael Grätzel ◽  
Chun-Guey Wu
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
Synergistic Effect ◽  
Film Thickness ◽  
Spin Coating ◽  
Perovskite Solar Cells ◽  
Lateral Size ◽  
High Quality ◽  
Coating Method ◽  
Vapor Treatment

A high quality thick (500 nm) CH3NH3PbI3perovskite absorber with a horizontal grain size up to 3 μm and a lateral size equal to the film thickness was prepared by the synergistic effect of a H2O additive and DMF vapor treatmentviaa two-step spin coating method.

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.

Ferroelectric domains in methylammonium lead iodide perovskite solar cells

2018 ◽  
Author(s):  
Holger Röhm ◽  
Tobias Leonhard ◽  
Michael J. Hoffmann ◽  
Alexander Colsmann
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Lead Iodide ◽  
Ferroelectric Domains ◽  
Methylammonium Lead Iodide
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