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Perovskite structural solar battery and preparation method thereof

A perovskite structure, solar cell technology, applied in the field of solar cells, can solve the problems of electrolyte leakage and low efficiency of DSC

Inactive Publication Date: 2014-04-02
CHANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Although the efficiency of dye-sensitized solar cells (DSC) using liquid electrolytes has reached 12% [A.Yella, et al. Porphyrin-sensitized solar cells with cobalt (II / III)-based redox electrolyte exceed 12 percent efficiency, Science,2011,334,629–634 ], but the electrolyte of this type of DSC is prone to leakage; for this reason, solid-state sensitized solar cells have been widely studied, such as CsSnI3 as The photoelectric conversion efficiency of solid-state DSCs with hole conductors reaches 8.5% [Chung, I. et al. All-solid-state dye-sensitized solar cells with high efficiency, Nature, 2012, 485:486–489], but its efficiency Still lower than liquid electrolyte DSCs; recently, a new type of organic-inorganic hybrid perovskite structure battery has made breakthrough progress, and the efficiency exceeds that of liquid DSC; this new type of organic-inorganic hybrid perovskite battery structure is, in FTO A layer of titanium dioxide (TiO2, n-type semiconductor) is grown on the glass, and then CH3NH3 with a perovskite structure is deposited on it PbI3, then spin coat a layer of 2,2',7,7'-tetrakis[N,N-bis(4-methoxyphenyl)amino]-9,9'-spiro Difluorene (spiro-OMeTAD, p-type organic hole conductor), and finally a layer of gold (Au) electrode is vacuum evaporated to form a p-i-n structure battery, such as Figure 1 shows that the efficiency of this type of battery has exceeded 15% [Julian Burschka, Norman Pellet, et al. Sequential deposition as a route to high-performance perovskite-sensitized solar cells.nature,2013, 499,316–319; Mingzhen Liu. Michael B. Johnston & Henry J. Snaith. Efficient planar heterojunction pe rovskite solar cells by vapor deposition. Nature, 501,395–398.] is by far the most efficient solar cell except for silicon solar cells, but the price of spiro-OMeTAD is high, and the price of gold electrodes on it is also high

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  • Perovskite structural solar battery and preparation method thereof

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Experimental program
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Embodiment 1

[0024] 1. Select FTO glass with a sheet resistance of 10Ω and a transmittance of 80% as the substrate material.

[0025] 2. Using ALD technology to grow a 10 nm thick ZnO layer

[0026] Deposition conditions: reaction temperature 200°C, Zn(CH 2 CH 3 ) 2 (DEZ) for 1 s, nitrogen purge for 1.5 s, water for 500 ms, nitrogen purge for 1 s, repeat the above process 100 times.

[0027] 3. CH 3 NH 3 PB 3 Preparation of perovskite layer

[0028] (1) CH 3 NH 3 I Isopropanol solution preparation

[0029] Place a round-bottomed flask containing 20ml of methylamine in ice water at 0°C, add 22ml of hydroiodic acid while stirring into the flask, and continue stirring in an ice-water bath for 2 hours after the addition is complete, forming a colorless and transparent CH 3 NH 3 I solution; the solution was dried with a rotary evaporator, and then washed with ether to obtain white CH 3 NH 3 I crystals, will quantify the CH 3 NH 3 I crystals were dissolved in isopropanol with a s...

Embodiment 2

[0043] 1. Select FTO glass with a sheet resistance of 15Ω and a transmittance of 83% as the substrate material.

[0044] 2. Using ALD technology to grow 10 nm thick TiO 2 Floor

[0045] Water and titanium tetraisopropoxide are used as sources to grow a dense TiO2 layer with a thickness of 10nm on the substrate; the growth process is: the heating temperature of the titanium source is 70°C, and the reaction temperature of the chamber is 270°C. Pass titanium source for 1s, nitrogen purge for 5s, pass water vapor for 200ms, and nitrogen purge for 2s to complete one cycle, a total of 160 cycles are required.

[0046] 3. Preparation of CH by co-evaporation 3 NH 3 PB 3 perovskite layer

[0047] 10mg CH 3 NH 3 I crystal and 10 mgPbI powder were put into two tungsten boats respectively, and the two tungsten boats were heated at the same time, and the background vacuum was 1 10 -4 Pa, the heating electrode current is 25A, in TiO 2 500 nm thick CH was deposited on the layer 3...

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Abstract

The invention relates to solar batteries, in particular to a perovskite structural solar battery and a preparation method thereof. The preparation method comprises the following steps: first, depositing a titanium oxide or zinc oxide n-type layer on fluorine-doped SnO2(fluorine-doped tin oxide) conductive glass; then, depositing a layer of CH3NH3PbI3 with a hybrid perovskite structure; next, depositing a p-type silicon thin film; finally, depositing a metal electrode layer, wherein the zinc oxide or titanium oxide layer is prepared by an atomic layer deposition method; by the atomic layer deposition method, a very dense oxide can be prepared; moreover, the thickness of the film can be controlled accurately; the CH3NH3PbI3 with the hybrid perovskite structure can be prepared by a solution method or a co-evaporation method; the p-type silicon thin film can be prepared by a plasma chemical vapor deposition method; a metal electrode can be prepared by a thermal evaporation or a sputtering method. The preparation method is characterized in that a spiro-OMeTAD organic p-type layer is replaced with the p-type silicon thin film, so that the cost is low; the large-area production is easily realized; the stability of a battery can be improved.

Description

technical field [0001] The invention relates to a solar cell, in particular to a perovskite structure solar cell and a preparation method thereof. Background technique [0002] Although the efficiency of dye-sensitized solar cells (DSC) using liquid electrolytes has reached 12% [A.Yella, et al. Porphyrin-sensitized solar cells with cobalt (II / III)-based redox electrolyte exceed 12 percent efficiency, Science ,2011,334,629–634], but the electrolyte of this type of DSC is prone to leakage; for this reason, solid-state sensitized solar cells have been extensively studied, such as the photoelectric conversion efficiency of solid-state DSCs with CsSnI3 as a hole conductor reached 8.5%【 Chung, I.et al. All-solid-state dye-sensitized solar cells with high efficiency, Nature, 2012, 485:486–489], but its efficiency is still lower than liquid electrolyte DSCs; recently, a new type of organic-inorganic hetero The battery with perovskite structure has made a breakthrough, and its effic...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCY02E10/549H10K71/164H10K71/60H10K85/00H10K30/40H10K2102/00Y02P70/50
Inventor 袁宁一董旭丁建宁胡宏伟房香
Owner CHANGZHOU UNIV