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Perovskite structure organic-inorganic ternary alloy heterocomplex film photoanode with adjustable absorption spectrum and preparation method thereof

A perovskite structure and ternary alloy technology, which is applied in the fields of electrical components, semiconductor/solid-state device manufacturing, and electrical solid-state devices, can solve problems such as poor photoelectrochemical stability, limited industrial applications, and widening of the spectral response range.

Active Publication Date: 2015-08-19
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the photoelectrochemical stability of traditional Pb-based perovskite hybrids is poor, the film absorption cut-off wavelength is about 800nm, the spectral response range still needs to be broadened, and the toxicity of Pb also limits its industrial application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In this example, the perovskite structure organic-inorganic ternary alloy hybrid is CH 3 NH 3 (Pb 0.1 sn0.9 ) 0.9 Ge 0.1 I 3 . , that is, R is a methyl group, x=0.1, y=0.9. The conductive glass layer is FTO, the thickness of the conductive glass layer is 300nm, the thickness of the titanium dioxide layer is 400nm, and the thickness of the perovskite structure organic-inorganic ternary alloy hybrid layer is 500nm. The preparation process is as follows:

[0027] (1)CH 3 NH 3 (Pb 0.1 sn 0.9 ) I 3 Synthesis of: 5mmol CH 3 NH 3 I and 0.5 mmol PbI 2 , 4.5mmolSnI 2 Dissolve HI and H in a volume ratio of 4:1 3 PO 2 In the mixed solution, the total concentration of the dissolved solution is 0.12mol / L, heated to 110°C for 4 hours, the solution turns bright yellow, and after cooling and filtering, CH 3 NH 3 (Pb 0.1 sn 0.9 ) I 3 crystals.

[0028] (2)CH 3 NH 3 GeI 3 Synthesis: 5mmol GeO 2 Dissolved in volume ratio 1:1 HI and H 3 PO 2 In the mixed soluti...

Embodiment 2

[0034] The difference from Example 1 is that x=0.9.

[0035] Correspondingly, step (1) is: CH 3 NH 3 (Pb 0.9 sn 0.1 ) I 3 Synthesis of: 5mmol CH 3 NH 3 I and 4.5 mmol PbI 2 , 0.5mmolSnI 2 Dissolve HI and H in a volume ratio of 4:1 3 PO 2 In the mixed solution, heated to 110°C for 4 hours, the solution turned bright yellow, cooled and filtered to obtain CH 3 NH 3 (Pb 0.9 sn 0.1 ) I 3 crystals.

[0036] Finally, a perovskite structure organic-inorganic ternary alloy hybrid thin film photoanode is obtained, the absorption spectrum is close to 800nm, and the photoelectric conversion efficiency is 4.9%.

Embodiment 3

[0038] The difference from Example 1 is that x=0.5.

[0039] Correspondingly, step (1) is: CH 3 NH 3 (Pb 0.5 sn 0.5 ) I 3 Synthesis of: 5mmol CH 3 NH 3 I and 2.5 mmol PbI 2 , 2.5mmolSnI 2 Dissolve HI and H3PO in a volume ratio of 4:1 2 In the mixed solution, heated to 110°C for 4 hours, the solution turned bright yellow, cooled and filtered to obtain CH 3 NH 3 Pb 0.5 sn 0.5 I 3 crystals.

[0040] Finally, a perovskite structure organic-inorganic ternary alloy hybrid thin film photoanode is obtained, the absorption spectrum is close to 950nm, and the photoelectric conversion efficiency is 5.2%.

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Abstract

The invention provides a perovskite structure organic-inorganic ternary alloy heterocomplex film photoanode with adjustable absorption spectrum and a preparation method thereof. The perovskite structure organic-inorganic ternary alloy heterocomplex film photoanode comprises a conductive glass layer, a titanium dioxide layer, a perovskite structure organic-inorganic ternary alloy heterocomplex layer which are successively stacked. The general formula of the perovskite structure organic-inorganic ternary alloy heterocomplex is RNH<3>(Pb<x>Sn<1-x>)<y>Ge<1-y>I<3>, wherein R=CH3, C2H5, or C3H7, 0 < x< 1, and 0 < y < 1. The perovskite structure organic-inorganic ternary alloy heterocomplex is used as a photoanode absorption layer. Compared with a conventional perovskite film photoanode, the perovskite structure organic-inorganic ternary alloy heterocomplex film photoanode uses the perovskite structure organic-inorganic ternary alloy heterocomplex as the photoanode absorption layer so as to reduce the toxicity of absorption material and widen the spectrum absorption of the absorption layer material, and may achieve band gap regulation and control of perovskite absorption material by adjusting a ratio of metal elements.

Description

technical field [0001] The invention relates to the technical field of thin-film solar cells, in particular to an organic-inorganic ternary alloy hybrid thin-film photoanode with an adjustable absorption spectrum and a preparation method thereof. Background technique [0002] In recent years, organic-inorganic perovskite hybrid solar cells have become a research hotspot in the field of photovoltaics due to their low cost and high absorption coefficient. Among them, the development of Pb-based perovskite solar cells is relatively rapid. The efficiency of laboratory cell samples certified by the National Renewable Energy Laboratory (NREL) has reached 20%, that is, Cu(In,Ga)Se 2 The level of thin film solar cells. However, the photoelectrochemical stability of traditional Pb-based perovskite hybrids is poor, the film absorption cut-off wavelength is about 800nm, and the spectral response range still needs to be broadened. The toxicity of Pb also limits its industrial applicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L51/54H01L51/56
CPCH10K85/30H10K50/81H10K71/00
Inventor 徐雪青王军霞梁柱荣徐刚
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI