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 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.

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.

scholarly journals Effect of Cl doping amount on the microstructure, photovoltaic properties and ferroelectric properties of Bi-based lead-free perovskite

2019 ◽  
Vol 09 (02) ◽  
pp. 1950013 ◽  
Author(s):  
Shilong Zhang ◽  
Ruicheng Xu ◽  
Zhendong Li ◽  
Qianwei Zhang ◽  
Li Cheng ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Ferroelectric Properties ◽  
Lead Toxicity ◽  
Lead Free ◽  
Photoelectric Conversion Efficiency ◽  
Doping Content ◽  
Doping Amount ◽  
Photoelectric Conversion ◽  
Photovoltaic Properties ◽  
Transport Dynamics

Organic–inorganic hybrid perovskites with 3D perovskite structure have gained much attention as light harvesting materials in thin-film photovoltaics. This is because of their outstanding light-absorption characteristics, charge-transport dynamics and their simple processability using lab-scale solution and vapor phase deposition techniques. However, the inherent instability and lead toxicity of lead-based PSCs are the major problems at present. Recent studies have shown that the (CH3NH[Formula: see text]Bi2I9 (MBI) 0D bismuth-based compound can be used as an optical absorption layer in solar cells. In this paper, the (CH3NH[Formula: see text]Bi2I9 was doped with Cl− and a series of (CH3NH[Formula: see text]Bi2I[Formula: see text]Clx films were prepared. The effects of different doping amounts on the microstructure, photovoltaic properties and ferroelectric properties were systematically investigated. Scanning electron microscope (SEM) and Atomic force microscope (AFM) analysis showed that with the increase of doping content, the density of the films increased and the roughness decreased. The photoelectric conversion efficiency of (CH3NH[Formula: see text]Bi2I[Formula: see text]Clx raises with the increase of doping content. For example, the photoelectric conversion efficiency of (CH3NH[Formula: see text]Bi2I3Cl6 is 0.473%. We find that the leakage current descends into the increase in doping content, which may be due to the increase in the film density and the decrease of porosity. These research results have a positive effect on the development of Bi-based lead-free perovskite.

Fabrication of lead-free CsBi3I10 based compact perovskite thin films by employing solvent engineering and anti-solvent treatment techniques: an efficient photo-conversion efficiency up to 740 nm

2020 ◽  
Vol 4 (10) ◽  
pp. 5042-5049
Author(s):  
Pandiyarajan Mariyappan ◽  
Towhid H. Chowdhury ◽  
Shanthi Subashchandran ◽  
Idriss Bedja ◽  
Hamid M. Ghaithan ◽  
...  
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
Conversion Efficiency ◽  
Perovskite Solar Cells ◽  
Lead Free ◽  
Solvent Treatment ◽  
Solvent Engineering ◽  
Treatment Techniques

Lead free CsBi3I10 based thin films has been developed for perovskite solar cells by introducing antisolvent method with photo conversion efficiency up to 740 nm.

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