Optical properties of photovoltaic materials: Organic-inorganic mixed halide perovskites CH3NH3Pb(I1-yXy)3 (X = Cl, Br)

2018 ◽  
Vol 1144 ◽  
pp. 1-8 ◽  
Author(s):  
Sinan Zhu ◽  
Miao Jiang ◽  
Jinting Ye ◽  
Haiming Xie ◽  
Yongqing Qiu
Keyword(s):  
Optical Properties ◽  
Photovoltaic Materials ◽  
Halide Perovskites

First-principles study on the electronic and optical properties of the orthorhombic CsPbBr3 and CsPbI3 with Cmcm space group

2021 ◽  
Author(s):  
Xianhao Zhao ◽  
Tianyu Tang ◽  
Quan Xie ◽  
like gao ◽  
Limin Lu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solar Cells ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
First Principles ◽  
Energy Conversion Efficiency ◽  
Space Group ◽  
Absorbing Materials ◽  
Halide Perovskites ◽  
Lead Halide

The cesium lead halide perovskites are regarded as effective candidates for light-absorbing materials in solar cells, which have shown excellent performances in experiments such as promising energy conversion efficiency. In...

scholarly journals Understanding liquefaction in halide perovskites upon methylamine gas exposure

RSC Advances ◽  
2021 ◽  
Vol 11 (33) ◽  
pp. 20423-20428
Author(s):  
Wencai Zhou ◽  
Zilong Zheng ◽  
Yue Lu ◽  
Manling Sui ◽  
Jun Yin ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrical Power ◽  
Photovoltaic Materials ◽  
Halide Perovskites ◽  
Gas Exposure

Methylamine (CH3NH2, MA) gas-induced fabrication of organometal CH3NH3PbI3 based perovskite thin films are promising photovoltaic materials that transform the energy from absorbed sunlight into electrical power.

Organic–inorganic hybrid lead halide perovskites for optoelectronic and electronic applications

2016 ◽  
Vol 45 (3) ◽  
pp. 655-689 ◽  
Author(s):  
Yixin Zhao ◽  
Kai Zhu
Keyword(s):  
Thin Film ◽  
Optical Properties ◽  
Recent Progress ◽  
Research Issues ◽  
Inorganic Hybrid ◽  
Halide Perovskites ◽  
Film Synthesis ◽  
Lead Halide

This article reviews recent progress on hybrid perovskites including crystal/thin-film synthesis, structural/chemical/electro-optical properties, (opto)electronic applications, and research issues/challenges.

Effects of many-body interactions on the transient optical properties of lead halide perovskites

2021 ◽  
Vol 130 (14) ◽  
pp. 143105
Author(s):  
Guangbiao Xiang ◽  
Yanwen Wu ◽  
Xiaona Miao ◽  
Yushuang Li ◽  
Jiancai Leng ◽  
...  
Keyword(s):  
Optical Properties ◽  
Many Body ◽  
Halide Perovskites ◽  
Many Body Interactions ◽  
Lead Halide

scholarly journals Enhanced control of self-doping in halide perovskites for improved thermoelectric performance

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Tianjun Liu ◽  
Xiaoming Zhao ◽  
Jianwei Li ◽  
Zilu Liu ◽  
Fabiola Liscio ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Surface Layer ◽  
Thermoelectric Properties ◽  
Figure Of Merit ◽  
Sacrificial Layer ◽  
Fine Tuning ◽  
Photovoltaic Materials ◽  
Chlorine Doping ◽  
Halide Perovskites ◽  
Transport Region

AbstractMetal halide perovskites have emerged as promising photovoltaic materials, but, despite ultralow thermal conductivity, progress on developing them for thermoelectrics has been limited. Here, we report the thermoelectric properties of all-inorganic tin based perovskites with enhanced air stability. Fine tuning the thermoelectric properties of the films is achieved by self-doping through the oxidation of tin (ΙΙ) to tin (ΙV) in a thin surface-layer that transfers charge to the bulk. This separates the doping defects from the transport region, enabling enhanced electrical conductivity. We show that this arises due to a chlorine-rich surface layer that acts simultaneously as the source of free charges and a sacrificial layer protecting the bulk from oxidation. Moreover, we achieve a figure-of-merit (ZT) of 0.14 ± 0.01 when chlorine-doping and degree of the oxidation are optimised in tandem.

scholarly journals The Effect of Carbon Defects in the Coal–Pyrite Vacancy on the Electronic Structure and Optical Properties: A DFT + U Study

Minerals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 815
Author(s):  
Wei Cheng ◽  
Chen Cheng ◽  
Baolin Ke
Keyword(s):  
Optical Properties ◽  
Electronic Structure ◽  
Absorption Coefficient ◽  
Light Absorption ◽  
Density Functional ◽  
Doping Concentration ◽  
Carbon Doping ◽  
Photovoltaic Materials ◽  
Light Absorption Coefficient ◽  
Carbon Impurities

Pyrite is a mineral often associated with coal in coal seams and is a major source of sulfur in coal. Coal–pyrite is widely distributed, easily available, low-cost, and non-toxic, and has high light absorption coefficient. So, it shows potential for various applications. In this paper, the density-functional theory (DFT + U) is used to construct coal–pyrite with carbon doped in the sulfur and iron vacancies of pyrite. The effects of different carbon defects, different carbon doping concentrations, and different doping distributions in the same concentration on the electronic structure and optical properties of coal–pyrite were studied. The results show that the absorption coefficient and reflectivity of coal–pyrite, when its carbon atom substitutes the iron and sulfur atoms in the sulfur and iron vacancies, are significantly higher than those of the perfect pyrite, indicating that coal–pyrite has potential for application in the field of photovoltaic materials. When carbon is doped in the sulfur vacancy, this impurity state reduces the width of the forbidden band; with the increase in the doping concentration, the width of the forbidden band decreases and the visible-light absorption coefficient increases. The distribution of carbon impurities impacts the band gap but has almost no effect on the light absorption coefficient, complex dielectric function, and reflectivity, indicating that the application of coal–pyrite to photovoltaic materials should mainly consider the carbon doping concentration instead of the distribution of carbon impurities. The research results provide a theoretical reference for the application of coal–pyrite in the field of photoelectric materials.

Synthesis and optical properties of photovoltaic materials based on the ambipolar dithienonaphthothiadiazole unit

2015 ◽  
Vol 3 (8) ◽  
pp. 4229-4238 ◽  
Author(s):  
Tatsuaki Nakanishi ◽  
Yasuhiro Shirai ◽  
Liyuan Han
Keyword(s):  
Optical Properties ◽  
Photovoltaic Materials

Dithieno[3′2′:5,6;2′′,3′′:7,8]naphtho[2,3-c][1,2,5]thiadiazole (DTNT) was designed to control the band energies of the polymers for photovoltaic materials.

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