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Perovskite solar cell and preparation method and polymer/fullerene derivative charge transport layer thereof

A technology of fullerene derivatives and charge transport layer, applied in the field of solar photovoltaic, can solve problems such as low cell efficiency, and achieve the effects of reducing recombination, reducing defect state density, and good covering effect

Active Publication Date: 2019-06-07
SHAANXI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, pure fullerene derivative charge transport layer suffers from various defects, resulting in low cell efficiency

Method used

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  • Perovskite solar cell and preparation method and polymer/fullerene derivative charge transport layer thereof
  • Perovskite solar cell and preparation method and polymer/fullerene derivative charge transport layer thereof
  • Perovskite solar cell and preparation method and polymer/fullerene derivative charge transport layer thereof

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Embodiment 1

[0071] Step 1, prepare FTO glass substrate

[0072] First soak the dust-free paper with ethanol, scrub the FTO glass, and use acetone, isopropanol, and ethanol as cleaning liquids for ultrasonic cleaning in sequence. The cleaning time for each type of cleaning liquid is 30 minutes; after cleaning, dry it with nitrogen as the FTO glass. The glass substrate is spare.

[0073] Step 2, preparation of PEDOT:PSS charge transport layer on FTO glass substrate

[0074] After the FTO glass substrate is blown clean, put it into a UV ozone processor for 15 minutes to increase the affinity, and then use a high-temperature tape to reserve the position of the evaporation electrode to ensure that the tape is compacted and marked at the same time; the PEDOT: The PSS dispersion was spin-coated on the FTO glass substrate to prepare a void transport layer. The amount of PEDOT:PSS dispersion was 100uL, the spin-coating speed was 4000rpm, and the time was 45s. The FTO / PEDOT:PSS obtained by spin co...

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Abstract

The invention discloses a perovskite solar cell and a preparation method and polymer / fullerene derivative charge transport layer thereof. The perovskite solar cell comprises a glass substrate, a charge transport layer, a perovskite absorption layer, the polymer / fullerene derivative charge transport layer, a buffer layer and a metal electrode from bottom to top in sequence, wherein the polymer / fullerene derivative charge transport layer is of a heterojunction structure formed by a polymer and a fullerene derivative; and phase separation between a donor and an acceptor can be formed by doping, when the concentration ratio is appropriate, a good electron transport channel can be formed, the coverage effect is good, charge transport layer defects and carrier recombination are reduced, thus leakage currents are reduced, and electron transport is promoted. Through comparison, it is found that the dielectric constant of the charge transport layer of the perovskite solar cell of the structureis significantly increased by about 24% compared with pure fullerene derivatives, and other properties are not reduced; and the highest photoelectric conversion efficiency of the prepared perovskite solar cell can reach 20.60%.

Description

【Technical field】 [0001] The invention belongs to the technical field of solar photovoltaics, and in particular relates to a perovskite solar cell, a preparation method and a polymer / fullerene derivative charge transport layer thereof. 【Background technique】 [0002] Since 2009, organic-inorganic hybrid new perovskite solar cells have attracted great attention for their excellent performance. The current mainstream perovskite solar cell structure is divided into formal structure and trans structure. Compared with the formal structure, the trans structure has the characteristics of small hysteresis effect, does not require high temperature, and is closer to the requirements of commercialization. However, pure fullerene derivative charge transport layers suffer from various defects, resulting in low cell efficiency. 【Content of invention】 [0003] The object of the present invention is to overcome the above-mentioned shortcomings of the prior art, and provide a perovskite ...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCY02E10/549
Inventor 刘生忠张效荣杨栋姚准
Owner SHAANXI NORMAL UNIV
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