scholarly journals Controlled Growth of Porous InBr3: PbBr2 Film for Preparation of CsPbBr3 in Carbon-Based Planar Perovskite Solar Cells

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2408
Author(s):  
Kailin Chi ◽  
Hansi Xu ◽  
Bingtao Feng ◽  
Xianwei Meng ◽  
Daoyu Yu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Light Absorption ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Precursor Solution ◽  
Absorption Capacity ◽  
Step Method ◽  
Low Solubility ◽  
Planar Carbon ◽  
Carbon Based

Due to the low solubility of CsBr in organic solvents, the CsPbBr3 film prepared by the multi-step method has holes and insufficient thickness, and the light absorption capacity and current density of the perovskite film hinder the further improvement in the power conversion efficiency (PCE) of CsPbBr3 solar cells. In this study, we introduced InBr3 into the PbBr2 precursor solution and adjusted the concentration of PbBr2, successfully prepared PbBr2 with a porous structure on the compact TiO2 (c-TiO2) substrate to ensure that it fully reacted with CsBr, and obtained the planar carbon-based CsPbBr3 solar cells with high-quality perovskite film. The results reveal that the porous PbBr2 structure and the increasing PbBr2 concentration are beneficial to increase the thickness of the CsPbBr3 films, optimize the surface morphology, and significantly enhance the light absorption capacity. Finally, the PCE of the CsPbBr3 solar cells obtained after conditions optimization was 5.76%.

Highly efficient planar perovskite solar cells achieved by simultaneous defect engineering and formation kinetic control

2018 ◽  
Vol 6 (46) ◽  
pp. 23865-23874 ◽  
Author(s):  
Jiaqi Cheng ◽  
Hong Zhang ◽  
Shaoqing Zhang ◽  
Dan Ouyang ◽  
Zhanfeng Huang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Low Temperature ◽  
Power Conversion Efficiency ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Precursor Solution ◽  
Kinetic Control ◽  
Defect Engineering ◽  
High Quality ◽  
Formation Kinetic

Incorporation of non-fullerene acceptor into perovskite precursor solution is demonstrated to form high-quality perovskite films with low defect concentrations. The power conversion efficiency of low-temperature processed perovskite solar cells is improved up to 20.10%.

scholarly journals Efficient luminescent solar cells based on tailored mixed-cation perovskites

2016 ◽  
Vol 2 (1) ◽  
pp. e1501170 ◽  
Author(s):  
Dongqin Bi ◽  
Wolfgang Tress ◽  
M. Ibrahim Dar ◽  
Peng Gao ◽  
Jingshan Luo ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Precursor Solution ◽  
Weight Percent ◽  
Open Circuit ◽  
Single Step ◽  
Molar Ratio

We report on a new metal halide perovskite photovoltaic cell that exhibits both very high solar-to-electric power-conversion efficiency and intense electroluminescence. We produce the perovskite films in a single step from a solution containing a mixture of FAI, PbI2, MABr, and PbBr2(where FA stands for formamidinium cations and MA stands for methylammonium cations). Using mesoporous TiO2and Spiro-OMeTAD as electron- and hole-specific contacts, respectively, we fabricate perovskite solar cells that achieve a maximum power-conversion efficiency of 20.8% for a PbI2/FAI molar ratio of 1.05 in the precursor solution. Rietveld analysis of x-ray diffraction data reveals that the excess PbI2content incorporated into such a film is about 3 weight percent. Time-resolved photoluminescence decay measurements show that the small excess of PbI2suppresses nonradiative charge carrier recombination. This in turn augments the external electroluminescence quantum efficiency to values of about 0.5%, a record for perovskite photovoltaics approaching that of the best silicon solar cells. Correspondingly, the open-circuit photovoltage reaches 1.18 V under AM 1.5 sunlight.

scholarly journals Double-Layered Zirconia Films for Carbon-Based Mesoscopic Perovskite Solar Cells and Photodetectors

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
George Syrrokostas ◽  
George Leftheriotis ◽  
Spyros N. Yannopoulos
Keyword(s):  
Solar Cells ◽  
Incident Light ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Perovskite Layer ◽  
Zirconia Film ◽  
Harvesting Efficiency ◽  
Zirconia Nanoparticles ◽  
Zirconia Films ◽  
Carbon Based

Carbon-based mesoscopic perovskite solar cells (PSCs) and photodetectors were fabricated with the application of double-layered ZrO2 films, consisting of zirconia nanoparticles and microparticles for the first and the second layer, respectively. This assembly exploits the ability of the zirconia microparticles to scatter and hence diffuse the incident light, causing a more efficient illumination of the perovskite layer. As a result, the photocurrent densities produced by a photodetector and a carbon-based PSC were increased by nearly 35% and 28%, respectively, compared to devices assembled using a conventional single zirconia film. Following the increase in the photocurrent, the responsivity of the photodetector and the power conversion efficiency of the PSC were increased analogously, due to the improved light harvesting efficiency of the perovskite layer. Parameters, such as the total thickness, the roughness, and the crystallinity of the films, were examined. Differences in the grain size and in the crystal planes of the perovskite were observed and evaluated. These results demonstrate that a double-layered ZrO2 film can enhance the efficiency of solar cells and photodetectors, enhancing the prospects for their potential commercialization.

New PCBM/carbon based electron transport layer for perovskite solar cells

2017 ◽  
Vol 19 (27) ◽  
pp. 17960-17966 ◽  
Author(s):  
Abdullah Al Mamun ◽  
Tanzila Tasnim Ava ◽  
Kai Zhang ◽  
Helmut Baumgart ◽  
Gon Namkoong
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Carbon Based

Perovskite solar cells with PCBM/C60 showed a power conversion efficiency of 14% while perovskite solar cells with PCBM/carbon increased to 16%.

scholarly journals Enhancing the performance and stability of carbon-based perovskite solar cells by the cold isostatic pressing method

RSC Advances ◽  
2017 ◽  
Vol 7 (77) ◽  
pp. 48958-48961 ◽  
Author(s):  
Yangwen Zhang ◽  
Jize Wang ◽  
Xue Liu ◽  
Wangnan Li ◽  
Fuzhi Huang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Treatment Process ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Cold Isostatic Pressing ◽  
Hole Transport ◽  
Pressing Method ◽  
Isostatic Pressing ◽  
Post Treatment Process ◽  
Carbon Based

The cold isostatic pressing method was used as a post-treatment process for enhancing the power conversion efficiency and stability of carbon-based perovskite solar cells without hole transport materials.

All room-temperature processing efficient planar carbon-based perovskite solar cells

2021 ◽  
Vol 489 ◽  
pp. 229345
Author(s):  
Fei Deng ◽  
Xiangnan Sun ◽  
Xinding Lv ◽  
Yao Li ◽  
Siqi Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Room Temperature ◽  
Perovskite Solar Cells ◽  
Planar Carbon ◽  
Carbon Based

scholarly journals Fabrication of Porous Lead Bromide Films by Introducing Indium Tribromide for Efficient Inorganic CsPbBr3 Perovskite Solar Cells

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1253
Author(s):  
Xianwei Meng ◽  
Kailin Chi ◽  
Qian Li ◽  
Bingtao Feng ◽  
Haodi Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Perovskite Solar Cell ◽  
State Density ◽  
Trap State ◽  
Lead Bromide ◽  
Low Solubility ◽  
Multi Step Methods

In the process of preparing CsPbBr3 films by two-step or multi-step methods, due to the low solubility of CsBr in organic solvents, the prepared perovskite films often have a large number of holes, which is definitely not conducive to the performance of CsPbBr3 perovskite solar cells (PSCs). In response to this problem, this article proposed a method of introducing InBr3 into the PbBr2 precursor to prepare a porous PbBr2 film to increase the reaction efficiency between CsBr and PbBr2 and achieve the purpose of In (Ⅲ) incorporation, which not only optimized the morphology of the produced CsPbBr3 film but also enhanced the charge extraction and transport capabilities, which was ascribed to the reduction of the trap state density and impurity phases in the perovskite films, improving the performance of CsPbBr3 PSCs. At the optimal InBr3 concentration of 0.21 M, the InBr3:CsPbBr3 perovskite solar cell exhibited a power conversion efficiency of 6.48%, which was significantly higher than that of the pristine device.

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