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Perovskite light absorbing material and preparation method thereof

A light absorbing material and perovskite technology, applied in the field of materials, can solve the problems of poor film formation quality and easy oxidation, and achieve the effects of reducing toxicity, increasing light absorption coefficient, and pollution-free environment.

Inactive Publication Date: 2017-09-05
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CaI 3 It is a material that has been studied more recently, but CsGeI 3 The disadvantage is that the quality of film formation is poor during preparation and it is easy to oxidize

Method used

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  • Perovskite light absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: RbGeBr 3 The preparation method of perovskite light-absorbing material specifically comprises the following steps:

[0019] (1) GeO 2 Join in hydrobromic acid solution to obtain acid solution A, wherein the concentration of hydrobromic acid solution is 6mol / L, Ge in acid solution A 4+ The ion concentration is 0.015mol / L;

[0020] (2) At a temperature of 95°C, add hypophosphorous acid solution to solution A obtained in step (1) and react for 8 minutes, wherein the concentration of hypophosphorous acid solution is 0.0182mol / mL, and the volume ratio of solution A to hypophosphorous acid solution 10.5:1;

[0021] (3) At a temperature of 95°C, add rubidium salt (rubidium bromide is rubidium bromide) to the reaction solution obtained in step (2) and react for 8 minutes, wherein the rubidium salt (rubidium bromide) and GeO 2 The molar ratio is 1:1, solid-liquid separation, washing, drying to obtain RbGeBr 3 Perovskite light-absorbing materials;

[0022] The Rb...

Embodiment 2

[0023] Example 2: RbGeI 3 The preparation method of perovskite light-absorbing material specifically comprises the following steps:

[0024] (1) GeO 2 Join in the hydroiodic acid solution to obtain acid solution A, wherein the concentration of the hydroiodic acid solution is 8mol / L, Ge in the acid solution A 4+ The ion concentration is 0.013mol / L;

[0025] (2) At a temperature of 100°C, add hypophosphorous acid solution to solution A obtained in step (1) and react for 10 minutes, wherein the concentration of hypophosphorous acid solution is 0.0184 mol / mL, and the volume ratio of solution A to hypophosphorous acid solution is 9.5:1;

[0026] (3) At a temperature of 100°C, add rubidium salt (rubidium iodide is rubidium iodide) to the reaction solution obtained in step (2) and react for 10 minutes, wherein the rubidium salt (rubidium iodide) and GeO 2 The molar ratio is 1:1, solid-liquid separation, washing, drying to get RbGeI 3 Perovskite light-absorbing materials;

[002...

Embodiment 3

[0028] Example 3: RbGeBr 3 The preparation method of perovskite light-absorbing material specifically comprises the following steps:

[0029] (1) GeO 2 Join in hydrobromic acid solution to obtain acid solution A, wherein the concentration of hydrobromic acid solution is 7mol / L, Ge in acid solution A 4+ The ion concentration is 0.014mol / L;

[0030] (2) At a temperature of 96°C, add hypophosphorous acid solution to solution A obtained in step (1) and react for 8 minutes, wherein the concentration of hypophosphorous acid solution is 0.0183mol / mL, the volume ratio of solution A to hypophosphorous acid solution 9.8:1;

[0031] (3) At a temperature of 96°C, add rubidium salt (rubidium bromide) to the reaction solution obtained in step (2) and react for 9 minutes, wherein the rubidium salt (rubidium bromide) and GeO 2 The molar ratio is 1:1, solid-liquid separation, washing, drying to obtain RbGeBr 3 Perovskite light-absorbing materials;

[0032] The RbGeBr prepared in this emb...

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Abstract

The invention discloses a perovskite light absorbing material and a preparation method thereof, and belongs to the technical field of materials. The preparation method of the perovskite light absorbing material comprises the steps of adding GeO2 to a halogen acid solution, then adding a hypophosphorous acid solution and reacting, then adding rubidium salt and reacting, and performing solid-liquid separation, washing and drying to acquire an RbGeX3 perovskite light absorbing material, wherein X is Br or I. The perovskite light absorbing material (RbGeX3) prepared according to the invention greatly expands the type and the scope of perovskite photoelectric materials, can significantly increase the light absorbing coefficient in the visible light range and improves the photoelectric conversion efficiency.

Description

technical field [0001] The invention relates to a perovskite light-absorbing material and a preparation method thereof, belonging to the technical field of materials. Background technique [0002] With the rapid development of human society, people's demand for energy is also increasing rapidly. The limited traditional fossil energy is consumed and exhausted day by day, which has caused a series of problems such as environmental pollution and global warming, which has triggered people's demand for sustainable energy. Urgent needs. Energy development provides an important guarantee for the sustainable development of human civilization. As a clean and inexhaustible energy source, solar energy can perfectly solve the increasingly acute contradiction between the environment and energy. How to make full use of solar energy has become the focus of attention of scientists all over the world, and how to improve the photoelectric conversion efficiency of solar cells to reduce the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42C01G17/00
CPCC01G17/006H10K30/10Y02E10/549
Inventor 张远弟冯晶
Owner KUNMING UNIV OF SCI & TECH
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