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Quasi-two-dimensional perovskite solar cell of trans-plane structure and preparation method thereof

A technology of solar cells and planar structures, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problem of serious carrier recombination, achieve the effects of reducing pinholes, increasing grain size, and improving conductivity

Pending Publication Date: 2021-11-16
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a quasi-two-dimensional perovskite with a trans planar structure for the serious problem of carrier recombination at the in

Method used

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  • Quasi-two-dimensional perovskite solar cell of trans-plane structure and preparation method thereof
  • Quasi-two-dimensional perovskite solar cell of trans-plane structure and preparation method thereof
  • Quasi-two-dimensional perovskite solar cell of trans-plane structure and preparation method thereof

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Embodiment 1

[0034] The quasi-two-dimensional perovskite solar cells with trans-planar structure were fabricated according to the following steps:

[0035]Step 1: Put the 2cm×2cm FTO conductive glass into the cleaning rack, use detergent, deionized water, acetone, isopropanone and absolute ethanol to clean it ultrasonically, and then blow it dry with nitrogen. Dissolve 0.1g of nickel acetate in 4mL of ethanol solution, add 24uL of ethanolamine, and stir in a water bath at 60°C for 6-10h; after filtration, obtain a nickel oxide precursor solution; on the surface of the pretreated FTO glass Spin coat the hole transport layer precursor solution. Spin coating at a speed of 4000 rpm for 40 s, and then anneal at 280° C. for 60 min to obtain a nickel oxide hole transport layer.

[0036] Step 2: Add 1mg of KPF 6 Dissolve in 1mL acetonitrile solvent and stir for 10-16h. Spin coating KPF on the hole transport layer 6 solution as an interfacial modification layer. The spin-coating speed was 5000...

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Abstract

The invention discloses a quasi-two-dimensional perovskite solar cell of a trans-plane structure. The quasi-two-dimensional perovskite solar cell comprises a conductive substrate, a hole transport layer, an interface modification layer, a perovskite light absorption layer, an electron transport layer, an interface modification layer and a metal cathode which are sequentially stacked from bottom to top; the hole transport layer is nickel oxide, and the interface modification layer is potassium hexafluorophosphate (KPF6) with the thickness of 2-5 nm. According to the invention, KPF6 is introduced between the hole transport layer and the perovskite light absorption layer as an interface modification layer, so that the conductivity of the nickel oxide layer can be improved through formation of Ni-F bonds, defects on the lower surface of the perovskite light absorption layer can be passivated, and the effects are beneficial to acceleration of transport of hole carriers at the interface of the hole transport layer and the perovskite light absorption layer. In addition, the KPF6 modified layer is also beneficial to improving the quality of the perovskite thin film. Through interface modification engineering, the device performance of the quasi-two-dimensional perovskite solar cell can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of perovskite solar cells, in particular to a quasi-two-dimensional perovskite solar cell with a reverse planar structure and a preparation method thereof. Background technique [0002] In recent years, perovskite solar cells have advanced by leaps and bounds in the photovoltaic industry, and their photoelectric conversion efficiency has rapidly grown from 3.8% to 25.6% in just a decade. This growth rate has brought great benefits to the green energy revolution. encouragement. Perovskite materials have the advantages of tunable bandgap, long carrier lifetime, long carrier diffusion length, low exciton binding energy, high molar extinction coefficient, low cost and easy preparation. According to the calculation of the Shockley-Queiser limit theory, a light-absorbing material with a band gap of 1.6eV can achieve a theoretical limit efficiency of about 30.5%, which means that perovskite solar cells can be furt...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/44H01L51/00
CPCH10K71/12H10K71/40H10K85/00H10K30/10H10K30/80Y02E10/549
Inventor 于华侯鸿铭张倩刘金龙颜卓菲汤星陈俊文
Owner SOUTHWEST PETROLEUM UNIV