Perovskite solar cell having hole transport layer with comb fiber structures and preparation method thereof
AssigneeLongi Green Energy Technology Co., Ltd.
InventorsYifan Diao, Junjie Xie, Zhao Wu, Zifeng Li, Zhuxing Sun, Tong Liu, Chen Xu
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Abstract
This application discloses a perovskite solar cell having a hole transport layer with comb fiber structures and a preparation method thereof. In one aspect, a perovskite solar cell includes a perovskite absorption layer, a transparent electrode layer and a hole transport layer with comb fiber structures that is on the transparent electrode layer. The hole transport layer with comb fiber structures includes a polythiophene-based polymer hole transport material.
Claims17
A solar cell, comprising a perovskite absorption layer, an electron transport layer, a transparent electrode layer and a hole transport layer on the transparent electrode layer, wherein the hole transport layer comprises a thin film layer and comb fiber structures on the thin film layer, wherein a height of a comb fiber structure of the comb fiber structures is greater than a diameter of the comb fiber structure, wherein the hole transport layer comprises a polythiophene-based polymer hole transport material, wherein the polythiophene-based polymer hole transport material is absent of PSS,
- wherein the diameter of the comb fiber structure is greater than a thickness of the thin film layer, and wherein a thickness of the perovskite absorption layer is greater than a distance between the electron transport layer and a tip of the comb fiber structures of the hole transport layer.
A method for forming a solar cell, comprising:
- depositing an oxidant on a transparent electrode layer;
- forming a hole transport layer having a thin film layer and comb fiber structures on the thin film layer by reacting the oxidant with a solution comprising a strongly polar acid and a thiophene-based hole transport material monomer, wherein a height of a comb fiber structure of the comb fiber structures is greater than a diameter of the comb fiber structure, wherein the hole transport layer is absent of PSS, wherein the diameter of the comb fiber structure is greater than a thickness of the thin film layer;
- forming a perovskite absorption layer on the hole transport layer;
- and
- forming an electron transport layer and an electrode layer on the perovskite absorption layer in sequence, and wherein a thickness of the perovskite absorption layer is greater than a distance between the electron transport layer and a tip of the comb fiber structures of the hole transport layer.
Dependencies are inferred from the claim text.