scholarly journals Study on the properties of perovskite materials under light and different temperatures and electric fields based on DFT

RSC Advances ◽  
2020 ◽  
Vol 10 (35) ◽  
pp. 20960-20971
Author(s):  
Xin-Feng Diao ◽  
Yan-lin Tang ◽  
De-Yong Xiong ◽  
Ping-Rui Wang ◽  
Li-ke Gao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electric Fields ◽  
Conversion Efficiency ◽  
Perovskite Solar Cells ◽  
Commercial Production ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Perovskite Materials ◽  
Different Temperatures

The photoelectric conversion efficiency of perovskite solar cells has improved rapidly, but their stability is poor, which is an important factor that restricts their commercial production.

scholarly journals Theoretical and experimental investigations on the bulk photovoltaic effect in lead-free perovskites MASnI3 and FASnI3

RSC Advances ◽  
2020 ◽  
Vol 10 (25) ◽  
pp. 14679-14688
Author(s):  
Liping Peng ◽  
Wei Xie
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
Photovoltaic Effect ◽  
Perovskite Solar Cells ◽  
Lead Free ◽  
Experimental Investigations ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion

Perovskite solar cells based on the lead free hybrid organic–inorganic CH3NH3SnI3 (MASnI3) and CH4N2SnI3 (FASnI3) perovskites were fabricated, and the photoelectric conversion efficiency (PCE) was assessed.

scholarly journals Reducing Defects in Organic-Lead Halide Perovskite Film by Delayed Thermal Annealing Combined with KI/I2 for Efficient Perovskite Solar Cells

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1607
Author(s):  
Kun-Mu Lee ◽  
Shun-Hsiang Chan ◽  
Wei-Hao Chiu ◽  
Seoungjun Ahn ◽  
Chang-Chieh Ting ◽  
...  
Keyword(s):  
Solar Cells ◽  
Thermal Annealing ◽  
Conversion Efficiency ◽  
Annealing Time ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Perovskite Layer ◽  
Organic Lead

This study improved quality of CH3NH3PbI3 (MAPbI3) perovskite films by delaying thermal annealing in the spin coating process and introducing KI and I2 to prepare MAPbI3 films that were low in defects for high-efficiency perovskite solar cells. The influences of delayed thermal annealing time after coating the MAPbI3 perovskite layer on the crystallized perovskite, the morphology control of MAPbI3 films, and the photoelectric conversion efficiency of solar cells were investigated. The optimal delayed thermal annealing time was found to be 60 min at room temperature. The effect of KI/I2 additives on the growth of MAPbI3 films and the corresponding optimal delayed thermal annealing time were further investigated. The addition of KI/I2 can improve perovskite crystallinity, and the conductivity and carrier mobility of MAPbI3 films. Under optimized conditions, the photoelectric conversion efficiency of MAPbI3 perovskite solar cells can reach 19.36% under standard AM1.5G solar illumination of 100 mW/cm2.

scholarly journals Study on Preparation and Stability of Perovskite Solar Cells with Supramolecular Interaction

2020 ◽  
Vol 185 ◽  
pp. 01065
Author(s):  
Qing Zhu ◽  
Chengsheng Li
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Optical Absorption Coefficient ◽  
Photoelectric Conversion Efficiency ◽  
Supramolecular Interaction ◽  
Photoelectric Conversion ◽  
Ion Migration ◽  
Photoelectric Properties ◽  
Perovskite Materials ◽  
The Stability

In recent years, perovskite solar cells have been developed rapidly because of its excellent crystalline properties, high optical absorption coefficient, high carrier mobility, long carrier life and direct band gap, and suitable to be used as light absorbing layer material of photovoltaic devices. However, the most prominent problem of perovskite materials is that a lot of organic cations will migrate and lose in the process of illumination or heating, which is considered to be the main reason for the performance degradation of perovskite films and devices. Therefore, the suppression of ion migration in perovskite is helpful to improve the stability of perovskite materials and devices and enhance their photoelectric properties. In order to effectively control the ion migration in perovskite films, this paper uses the cation-π supramolecular interaction, to prepare the perovskite films with better photoelectric performance and higher stability. The experimental results show that the photoelectric conversion efficiency of the perovskite solar cellsdevice doped with rubrene is increased from 18.60% to 20.86%, and the hysteresis of the cell is also significantly suppressed.

Research on the Photoelectric Conversion Efficiency of Grating Anti-Reflective Layer Solar Cells

2011 ◽  
Vol 216 ◽  
pp. 355-359 ◽  
Author(s):  
Hui Zhong ◽  
Yong Yi Gao ◽  
Ren Long Zhou ◽  
Bing Ju Zhou ◽  
Li Qiang Tang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Storage ◽  
Conversion Efficiency ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Grating Structure ◽  
Reflective Layer ◽  
Surface Grating ◽  
Coated Metal ◽  
Difference Time

The effect of grating structure on the photoelectric conversion efficiency of solar cells is studied with the finite-difference time-domain method. The influence of grating shape, height and the thickness of coated metal film is analysed. It is found that the variation of grating shape and height makes great changes of energy storage, especially of the photoelectric conversion efficiency and energy storage of the triangle grating. The comparison between un-optimized and optimized surface grating structure on solar cells shows that the optimized grating surface significantly increases the energy storage capability and greatly improves the efficiency.

Dye-Sensitized Solar Cells Based on Three-Dimensional Web-Like Structure Anodes

2012 ◽  
Vol 629 ◽  
pp. 332-338 ◽  
Author(s):  
Zhi Hua Tian ◽  
Jian Xi Yao ◽  
Mi Na Guli
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Three Dimensional ◽  
Precursor Solution ◽  
Photoelectric Conversion Efficiency ◽  
Tio2 Films ◽  
Photoelectric Conversion ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

TiO2 films with three-dimensional web-like structure have been prepared by the photo polymerization-induced phase separation method (PIPS). Scanning electron microscopy and X-ray diffraction were used to characterize the as-prepared TiO2 films. The results showed that the film texture could be tuned by changing the composition of the precursor solution. The TiO2 film with web-like structure exhibited high photocatalytic activity for the degradation of methylene blue (MB) dye. The as-prepared films were used as the photo-anodes in dye-sensitized solar cells (DSCs). The photoelectric conversion efficiency of the DSCs was significantly enhanced by changing the POGTA/TTB in the precursor solution. Because of the increased dye adsorption active sites and efficient electron transport in the TiO2 anode film, a photoelectric conversion efficiency of 3.015% was obtained.

scholarly journals CuI/Spiro-OMeTAD Double-Layer Hole Transport Layer to Improve Photovoltaic Performance of Perovskite Solar Cells

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 978
Author(s):  
Chaoqun Lu ◽  
Weijia Zhang ◽  
Zhaoyi Jiang ◽  
Yulong Zhang ◽  
Cong Ni
Keyword(s):  
Solar Cells ◽  
Double Layer ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Perovskite Layer

The hole transport layer (HTL) is one of the main factors affecting the efficiency and stability of perovskite solar cells (PSCs). However, obtaining HTLs with the desired properties through current preparation techniques remains a challenge. In the present study, we propose a new method which can be used to achieve a double-layer HTL, by inserting a CuI layer between the perovskite layer and Spiro-OMeTAD layer via a solution spin coating process. The CuI layer deposited on the surface of the perovskite film directly covers the rough perovskite surface, covering the surface defects of the perovskite, while a layer of CuI film avoids the defects caused by Spiro-OMetad pinholes. The double-layer HTLs improve roughness and reduce charge recombination of the Spiro-OMeTAD layer, thereby resulting in superior hole extraction capabilities and faster hole mobility. The CuI/Spiro-OMeTAD double-layer HTLs-based devices were prepared in N2 gloveboxes and obtained an optimized PCE (photoelectric conversion efficiency) of 17.44%. Furthermore, their stability was improved due to the barrier effect of the inorganic CuI layer on the entry of air and moisture into the perovskite layer. The results demonstrate that another deposited CuI film is a promising method for realizing high-performance and air-stable PSCs.

Indirect Preparation of Titanium Dioxide Oxidation Plating Layer as Photoelectrode Used in Dye-Sensitized Solar Cells

2014 ◽  
Vol 953-954 ◽  
pp. 1095-1098 ◽  
Author(s):  
Jun Zhang ◽  
Ya Han Wu ◽  
Fang Xue ◽  
Meng Jun Yuan ◽  
Yan Huo ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Solar Cells ◽  
Conversion Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Great Influence ◽  
Photoelectric Conversion Efficiency ◽  
Titanium Coating ◽  
Photoelectric Conversion ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

The structural morphology, arrangement of the nanocrystalline particles, porosity factor, surface state, crystalline phase and specific area of photoelectrode film have great influence on photoelectric performance of dye sensitized solar cells (DSSCs). At present, using TiO2 as the photoelectrode in the DSSC material has achieved very good photoelectric conversion efficiency. In this paper, the plating method is adopted to directly deposited the titanium coating on the conductive glass substrate, oxidizing the surface of titanium film, so that it is generated on the surface of titanium dioxide oxidation layer. Making it as the DSSC photoelectrode, obtained relative high photoelectric conversion efficiency.

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