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Perovskite solar cell using graphene quantum dots as hole-transporting layer

A graphene quantum dot, solar cell technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problem of reducing the photoelectric conversion efficiency of perovskite solar cells, limiting the hole migration rate of perovskite absorption layer, graphene oxide The problem of uneven chip size, etc., can improve the transmission mobility, enhance the photoelectric conversion efficiency, and achieve the effect of uniform distribution.

Inactive Publication Date: 2019-02-12
恒力(厦门)石墨烯科技产业集团有限公司
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Problems solved by technology

[0005] To sum up, the main problems of the current technology are: the stability of the hole transport layer of perovskite solar cells is poor and the carrier mobility is low, which greatly limits the migration rate of holes in the perovskite absorbing layer. Reducing the photoelectric conversion efficiency of perovskite solar cells
At the same time, the poor conductivity of graphene oxide as the hole layer will lead to a large series resistance of the device and a decrease in the fill factor.
In addition, the size of graphene oxide sheets is very non-uniform, and the reproducibility of device performance is poor, making the interfacial layer coverage uneven

Method used

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Embodiment Construction

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them.

[0036] see figure 1 , the present invention provides a technical solution: a perovskite solar cell using graphene quantum dots as a hole transport material, consisting of a substrate, a transparent electrode, a graphene quantum dot hole transport layer, a perovskite absorbing layer, Composed of electron transport layer and metal electrode, it is characterized by using graphene quantum dots as the hole transport layer, and the graphene quantum dots are decorated with noble metal nanoparticles. The specific steps for the preparation of this perovskite solar cell are:

[0037] S01: Evaporate a transparent electrode layer on a substrate of a certain size, and the thickness of the transparent electrode...

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Abstract

The invention belongs to the field of new energy sources, and discloses a perovskite solar cell using graphene quantum dots as a hole-transporting material. The perovskite solar cell consists of a substrate, a transparent electrode, a graphene quantum dot hole-transporting layer, a perovskite absorption layer, an electron transport layer and a metal electrode, and is characterized in that the graphene quantum dots are used as the hole transport layer, and noble metal nanoparticles are modified in the graphene quantum dots, so that the excellent charge carrier mobility characteristic of the graphene quantum dots can be fully utilized, and the hole mobility of the perovskite cell is improved; and moreover, through the surface plasmon excitation phenomenon of noble metals, the absorption efficiency of the cell to light can be enhanced, the absorption and conversion efficiency of the cell to light can be further effectively improved, so that the photoelectric conversion efficiency of the perovskite solar cell is greatly enhanced.

Description

technical field [0001] The invention belongs to the field of new energy, and in particular relates to a perovskite solar cell using graphene quantum dots as hole transport materials. Background technique [0002] Perovskite (CH 3 NH 3 wxya 3 , X=halogen atom) materials have attracted great attention of researchers due to their suitable direct bandgap, small exciton binding energy, good bipolar charge transport properties and abundant resources on the earth, and because of its device Solution processing, low cost and high photoelectric conversion efficiency make perovskite one of the most promising materials for solar cells. The hole transport layer is a key component of the battery. Selecting a suitable hole transport material as the connection layer between the perovskite active layer and the electrode can achieve effective hole transport and reduce carrier recombination, improving the performance of the device. performance. All kinds of hole transport layer materials ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48B82Y10/00B82Y30/00
CPCB82Y10/00B82Y30/00H10K30/15H10K2102/00Y02E10/549
Inventor 陈木成
Owner 恒力(厦门)石墨烯科技产业集团有限公司
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