US 12,075,637 B2
Perovskite solar cell and fabrication method thereof
Changsong Chen, Ningde (CN); Juanjuan Sun, Ningde (CN); Limei Zhou, Ningde (CN); Hanfang Li, Ningde (CN); Wenming Guo, Ningde (CN); Zhiqiang Wang, Ningde (CN); Guodong Chen, Ningde (CN); and Yongsheng Guo, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed on Aug. 18, 2023, as Appl. No. 18/452,101.
Application 18/452,101 is a continuation of application No. PCT/CN2022/092192, filed on May 11, 2022.
Prior Publication US 2023/0403869 A1, Dec. 14, 2023
Int. Cl. H10K 30/50 (2023.01); H10K 30/40 (2023.01); H10K 71/12 (2023.01); H10K 85/50 (2023.01)
CPC H10K 30/50 (2023.02) [H10K 30/40 (2023.02); H10K 71/12 (2023.02); H10K 85/50 (2023.02)] 19 Claims
OG exemplary drawing
 
1. A perovskite solar cell, comprising a transparent electrode, an electron transport layer, a perovskite layer, a hole transport layer, and a counter electrode in sequence;
wherein the perovskite layer comprises a main perovskite layer and a coating layer having two-dimensional perovskite, the coating layer covering both surface and periphery of the main perovskite layer, and the coating layer comprising:
a first overlay layer disposed between the main perovskite layer and the electron transport layer;
a second overlay layer disposed between the main perovskite layer and the hole transport layer; and
a third overlay layer covering the periphery of the main perovskite layer; and wherein:
LUMO energy level of the first overlay layer is lower than or equal to LUMO energy level of the main perovskite layer and an absolute value of a difference between the LUMO energy level of the first overlay layer and the LUMO energy level of the main perovskite layer is within a range of 0.05 eV to 0.42 eV;
the LUMO energy level of the first overlay layer is higher than or equal to LUMO energy level of the electron transport layer and an absolute value of a difference between the LUMO energy level of the first overlay layer and the LUMO energy level of the electron transport layer is within a range of 0.05 eV to 0.5 eV;
HOMO energy level of the second overlay layer is higher than or equal to HOMO energy level of the main perovskite layer and an absolute value of a difference between the HOMO energy level of the second overlay layer and the HOMO energy level of the main perovskite layer is within a range of 0.05 eV to 0.35 eV; or
the HOMO energy level of the second overlay layer is lower than or equal to HOMO energy level of the hole transport layer and an absolute value of a difference between the HOMO energy level of the second overlay layer and the HOMO energy level of the hole transport layer is within a range of 0 eV to 0.23 eV.