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An ion-doped perovskite solar cell

A technology for solar cells and ion doping, applied in the field of solar cells, can solve problems such as poor stability and existence, and achieve the effects of simple manufacturing methods, reduced hysteresis effects, and reduced crystal defects

Inactive Publication Date: 2018-05-04
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, in addition to the severe challenge of poor stability of perovskite solar cells (Nature Energy, 2016, 1:15015.), the hysteresis effect in the battery scanning process is another problem that needs to be solved urgently (J. Phys. Chem. Lett. 2014, May, 1511.)
Many experiments have proved that the hysteresis effect is mainly caused by the ion migration effect in the perovskite photosensitive layer (Nat.Mater.2015,14,193-198.EnergyEnviron.Sci.2015,8,995-1004.), improving the crystallization of perovskite crystals degree (J.Phys.Chem.Lett.2014,5,2927-2934.), passivation of grain boundaries (Nat.Commun.2015,6,7081.), using an inverted planar heterojunction structure (Energy Environ.Sci. 2014, July, 2359-2365.) can reduce the battery scan hysteresis curve, but the hysteresis effect still exists

Method used

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Embodiment 1

[0023] An ion-doped perovskite solar cell with a structure such as figure 1 As shown, it includes a conductive substrate 101 , a hole transport layer 102 , a perovskite photosensitive layer 103 , an electron transport layer 104 and a back electrode 105 from bottom to top. The conductive substrate 101 is an ITO transparent conductive electrode with a thickness of 150nm; the preferred 30nm thick PEDOT:PSS thin film of the hole transport layer 102; the (CH 3 NH 3 ) 0.95 (AS) 0.05 PB 2.9 Cl 0.1 ; Electron transport layer 104 is preferably PC with a thickness of 40nm 61 BM thin film; the back electrode 105 is preferably a silver electrode with a thickness of 100 nm.

[0024] In this embodiment, preferably A1 is CH 3 NH 3 + , A3 is AS + , B is Pb 2+ , X1 is I - , X2 is Cl - , the chemical formula of the corresponding perovskite photosensitive layer material is (CH 3 NH 3 ) 0.95 (AS) 0.05 PB 2.9 Cl 0.1 , wherein taurine hydrochloride doping amount x2=5%, namely rel...

Embodiment 2

[0037] An ion-doped perovskite solar cell with a structure such as figure 1 As shown, it includes a conductive substrate 101 , a hole transport layer 102 , a perovskite photosensitive layer 103 , an electron transport layer 104 and a back electrode 105 from bottom to top. The conductive substrate 101 is an ITO transparent conductive electrode with a thickness of 200nm; the preferred 40nm thick PEDOT:PSS thin film of the hole transport layer 102; the (CH 3 NH 3 ) 0.95 (AS) 0.05 PB 2.9 Cl 0.05 SCN 0.05 ; Electron transport layer 104 is preferably PC with a thickness of 50nm 61 BM thin film; the back electrode 105 is preferably a silver electrode with a thickness of 120nm.

[0038] In this embodiment, preferably A1 is CH 3 NH 3 + , A3 is AS + , B is Pb 2+ , X1 is I - , X2 is Cl - , X3 is SCN - , and the chemical formula of the corresponding perovskite photosensitive layer material is (CH 3 NH 3 ) 0.95 (AS) 0.05 PB 2.9 Cl 0.05 SCN 0.05 , wherein taurine hydro...

Embodiment 3

[0050] The difference between embodiment 3 and embodiment 1 is the configuration of the perovskite precursor solution in step 3: methyl iodide, taurine hydrochloride, lead iodide, lead chloride are in molar ratio 1.29:0.01:1.23: The ratio of 0.07 is mixed, and the chemical formula of the corresponding perovskite photosensitive layer material is (CH 3 NH 3 ) 0.99 (AS) 0.01 PB 2.9 Cl 0.1 , wherein taurine hydrochloride doping amount x2=1%, namely relative (CH 3 NH 3 ) 0.99 (AS) 0.01 PB 2.9 Cl 0.1 The molar weight of is 1%, all the other steps are identical with embodiment 1.

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Abstract

The invention provides an ion-doped perovskite solar cell, which comprises from bottom to top: a conductive substrate, a hole transport layer, a perovskite photosensitive layer, an electron transport layer and a back electrode. The perovskite photosensitive layer is made by spin-coating and annealing the perovskite precursor solution doped with taurine hydrochloride ASCl. A small amount of taurine hydrochloride can connect the crystal grains, passivate the interface layer, thereby reducing exciton recombination and crystal defects, and reducing the hysteresis effect. The perovskite solar cell prepared based on it has lower cost, simple preparation method and process, and can be produced on a large scale.

Description

technical field [0001] The invention belongs to the field of solar cells, in particular to an ion-doped perovskite solar cell. Background technique [0002] The current energy crisis and environmental pollution have become the focus of global attention. In recent years, the emergence of perovskite solar cells has attracted widespread attention from academia and industry. Since the perovskite solar cell was first prepared in 2009, its conversion efficiency has rapidly increased from 3.8% (Journal of the American Chemical Society, 2009, 131(17): 6050-6051.) to 22.1% (NREL), approaching level of commercialization. Compared with inorganic solar cells such as silicon, cadmium telluride, and copper indium gallium selenide, perovskite solar cells have the advantages of simple process and low cost. On the other hand, compared with organic, dye-sensitized, quantum dot solar cells, etc., the efficiency of perovskite solar cells is much higher than them. Therefore, perovskite solar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/46H01L51/48
CPCH10K85/00H10K30/10H10K30/00H10K30/80Y02E10/549
Inventor 杜春雷麻超燕陆仕荣
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI