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Methylamine-lead-iodide perovskite solar cells with organic light-emitting small molecule interface modification layer

An interface modification layer, methylamine lead iodine technology, applied in the direction of photovoltaic power generation, circuits, electrical components, etc., can solve the problem of low material absorption coefficient, achieve the effect of increasing light absorption, improving photoelectric conversion efficiency, and passivating surface defects

Active Publication Date: 2022-02-22
TAIYUAN UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: explore a kind of suitable interface passivation material, to solve CH 3 NH 3 PB 3 The problem of low absorption coefficient of materials in the near-infrared band

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  • Methylamine-lead-iodide perovskite solar cells with organic light-emitting small molecule interface modification layer
  • Methylamine-lead-iodide perovskite solar cells with organic light-emitting small molecule interface modification layer
  • Methylamine-lead-iodide perovskite solar cells with organic light-emitting small molecule interface modification layer

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Embodiment Construction

[0019] Methylamine-lead-iodide perovskite solar cells containing an organic light-emitting small molecule interface modification layer, the device structure is: ITO / PEDOT:PSS / CH 3 NH 3 PB 3 / DBP / PC 61 BM / Bphen / Ag, the thickness of the ITO anode is 100 nm, and the sheet resistance is 10 Ω / □. Before use, it is ultrasonically cleaned with deionized water, acetone, and isopropanol, and then dried with nitrogen and treated with a plasma cleaner. Surface 5 min, hole transport layer PEDOT:PSS thickness of 30 nm, RH 40% in the air spin-coated PEDOT:PSS aqueous solution on the ITO layer, and then annealed in air, spin-coating rate 7000 rpm, spin The coating time was 30 s, the annealing temperature was 120 °C, and the annealing time was 15 min. CH was spin-coated on the PEDOT:PSS film. 3 NH 3 PB 3 Precursor solution combined with cleaning process and multi-step atmosphere annealing treatment to obtain 650 nm thick CH 3 NH 3 PB 3 active layer, and transferred to N 2 atmosphere i...

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Abstract

The invention belongs to the technical field of solar cells. A methylamine-lead-iodide perovskite solar cell containing an organic light-emitting small molecule interface modification layer, the order of the methylamine-lead-iodide perovskite solar cell from bottom to top is a glass substrate deposited with a uniform layer of indium tin oxide ITO The anode of the anode, the poly(3,4-ethylenedioxythiophene)-polystyrenesulfonic acid PEDOT:PSS film deposited on the indium tin oxide ITO layer as the hole transport layer, the active layer, the interface modification layer as the active layer The organic light-emitting small molecule material tetraphenylbenzobisindenoperylene DBP layer spin-coated on the active layer, [6,6]-phenyl C60-butyric acid methyl as an electron transport layer spin-coated on the DBP layer Ester PC 61 BM layer, [4,7]-diphenyl-[1,10]-phenanthroline Bphen deposited on the electron transport layer as the cathode modification layer, and aluminum deposited on the electron transport layer by vacuum thermal evaporation as the cathode film or silver film.

Description

technical field [0001] The invention belongs to the technical field of solar cells, in particular to the field of organic-inorganic hybrid perovskite solar cells. Background technique [0002] Perovskite material, chemical formula: AMX 3 (A:CH 3 NH 3 + ; M: Pb 2+ ;X:I - ), the unit cell structure MX 6 Form octahedra and contact each other to form a three-dimensional structure, NH 3 CH 3 + Embedded in it, it has the advantages of simple synthesis, high absorption coefficient, adjustable band gap, weak exciton binding energy, long carrier diffusion distance, and low cost, and has attracted extensive attention from the scientific research community and the industry. At present, the highest photoelectric conversion efficiency of solar cells using perovskite materials as the active layer has reached more than 23%. The planar heterojunction perovskite solar cells with inverted structure can be prepared by the whole solution method at low temperature, so it has great deve...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/46
CPCY02E10/549
Inventor 郝玉英吴宇坤丁赛赛孙钦军刘一凡李战峰崔艳霞
Owner TAIYUAN UNIV OF TECH
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