A MgIn2S4-based intermediate band solar energy absorbing material and a preparation method thereof

A solar energy absorption, mgin2s4 technology, applied in the field of new semiconductor materials, can solve the problems of low efficiency of solar cells, scarcity of intermediate band semiconductor materials, etc., and achieve the effect of increasing the electron absorption path and enhancing the light absorption capacity.

Inactive Publication Date: 2018-12-18
SHANGHAI DIANJI UNIV
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Problems solved by technology

[0003] In order to overcome the above-mentioned defects of the prior art, aiming at the low efficiency of traditional solar cells and the scarcity of middle-band semiconductor materials, the object of the present invention is to provide a MgIn 2 S 4 Based on the intermediate band solar energy absorbing material and its preparation method, the spinel-type sulfide MgIn with narrow band gap and large visible light response range is selected 2 S 4 As an acceptor material, its optical absorption performance is greatly enhanced

Method used

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  • A MgIn2S4-based intermediate band solar energy absorbing material and a preparation method thereof
  • A MgIn2S4-based intermediate band solar energy absorbing material and a preparation method thereof
  • A MgIn2S4-based intermediate band solar energy absorbing material and a preparation method thereof

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preparation example Construction

[0020] MgIn 2-x sn x S 4 Sample preparation method, specifically:

[0021] Step 1, Mg powder (4N), In particle (5N), S (5N) powder and Sn powder (4N) are according to stoichiometric ratio Mg:In:Sn:S=1:2-x:x:4(0

[0022] Step 2: Put the encapsulated quartz glass tube in a muffle furnace for sintering (sintering temperature is 600-750° C.), grind the obtained sample in an agate mortar and re-encapsulate in vacuum.

[0023] Step 3: Place the ground sample again in a muffle furnace for sintering for 48 hours (sintering temperature: 600-750° C.), and finally grind again to obtain the product.

Embodiment 1-3

[0025] Prepare MgIn according to the above steps 1-3 2 S 4 、MgIn 1.9 sn 0.1 S 4 、MgIn 1.95 sn 0.05 S 4 Sample, the stoichiometric ratio of Mg powder (4N), In particle (5N), S (5N) powder and Sn powder (4N) in embodiment 1-3 is Mg:In:Sn:S=1:2-x: x:4, get x=0,0.05,0.1 respectively in embodiment 1-3; Wherein, prepare MgIn 2 S 4 For samples, the sintering temperature was 600°C, the sintering time was 48h, and the grinding time was 3min; the preparation of MgIn 1.95 sn 0.05 S 4 For samples, the sintering temperature was 700°C, the sintering time was 36h, and the grinding time was 5min; the preparation of MgIn 1.9 sn 0.1 S 4 For samples, the sintering temperature is 750°C, the sintering time is 60h, and the grinding time is 4min.

[0026] See attached figure 1 , for MgIn 2 S 4 crystal structure with an absorption coefficient of 1×10 4 -1×10 5 cm -1 , the space group is Fd-3m, and the bandgap is 2.12-2.28eV.

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Abstract

The invention discloses a MgIn2S4-based intermediate band solar energy absorbing material and a preparation method thereof, wherein the chemical formula is MgIn2-xSnxS4, 0 < x < 2, obtained by vacuumsolid-state reaction sintering process through the formation of a half-full intermediate band in the in-site doping element Sn of the parent compound MgIn2S4; Compared with the traditional solar cellmaterials, the above materials increase the electron absorption path and enhance the light absorption capacity.

Description

technical field [0001] The invention belongs to the field of new semiconductor materials, and relates to a new material for optical absorption enhancement, in particular to a kind of MgIn 2 S 4 Based intermediate band solar energy absorbing material and preparation method thereof. Background technique [0002] Since the industrial revolution, fossil energy such as coal, oil, and natural gas has become the main energy source of human civilization. However, since modern times, the reserves of traditional energy have been gradually exhausted, and the problem of pollution has become increasingly serious. Human beings have begun to actively look for alternative energy sources. New energy sources such as solar energy and wind energy are being developed and popularized on an increasingly large scale. Due to various reasons, new energy cannot support the huge energy demand alone. Therefore, for a long time, traditional energy will coexist with new energy. Among the new energy so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/032
Inventor 鲁书瀚陈平张栋栋
Owner SHANGHAI DIANJI UNIV
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