Dual Optimization of Bulk and Surface via Guanidine Halide for Efficient and Stable 2D/3D Hybrid Perovskite Solar Cells

Xiaobo Zhang; Wencai Zhou; Xiaoqing ChenYichuan ChenXuhong LiManqi WangYing ZhouHui YanZilong ZhengYongzhe Zhang

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Dual Optimization of Bulk and Surface via Guanidine Halide for Efficient and Stable 2D/3D Hybrid Perovskite Solar Cells

机译：Dual Optimization of Bulk and Surface via Guanidine Halide for Efficient and Stable 2D/3D Hybrid Perovskite Solar Cells

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In order to improve both performance and stability of perovskite solar cells,a design is provided by combining the advantages of high-efficiency 3Dperovskite solar cells (PSCs) and long-term stability 2D PSCs. A 2D/3D hybridperovskite film with a dual (bulk- and surface-) passivation approach is realized,based on in-depth discussion of the guanidine halide (GuX) passivationmechanisms. The approach can reduce the charge carrier losses in the bulkand prevent decomposition at the surface. Based on a combination of ab initiomolecular dynamics simulations, Urbach energy, and photovoltage measurements,it is indicated that the engineered components of GuX salts are GuClfor bulk treatment and GuI surface treatment, respectively. The former canlower the nonradiative recombination, and the latter can prevent the halogenout.Moreover, drive-level capacitance profiling is employed in the contextof the 2D/3D perovskite structure for revealing and proving the passivationmechanism. The 2D/3D hybrid perovskites achieve long-term stability (efficiencydegradation <10% after 30 days without encapsulation) and significantenhanced efficiency (22.53%) compared with the efficiency (20.31%) of thecontrol device. This work represents a rational design strategy for bulk andsurface passivation treatment in 2D/3D hybrid perovskites.

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来源
《Advanced energy materials》 |2022年第26期|2201105.1-2201105.11|共11页
作者
Xiaobo Zhang; Wencai Zhou; Xiaoqing ChenYichuan ChenXuhong LiManqi WangYing ZhouHui YanZilong ZhengYongzhe Zhang;
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College of Material Sciences and EngineeringBeijing University of TechnologyBeijing 100124, P. R. China;

College of Material Sciences and EngineeringBeijing University of TechnologyBeijing 100124, P. R. China, Key Laboratory of Optoelectronics TechnologyCollege of MicroelectronicsFaculty of Information TechnologyBeijing University of TechnologyBeijing 100124;

College of Material Sciences and EngineeringBeijing University of TechnologyBeijing 100124, P. R. China, School of Mechanical and Electrical EngineeringJingdezhen Ceramic UniversityJingdezhen, Jiangxi 333403, P. R. ChinaSchool of PhysicsBeihang UniversityBeijing 100191, P. R. ChinaElectronics and Photonics Research InstituteNational Institute of Advanced Industrial Scienceand Technology (AIST)Tsukuba 3058565, Japan;

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defect passivation; perovskite solar cells; stability;

Dual Optimization of Bulk and Surface via Guanidine Halide for Efficient and Stable 2D/3D Hybrid Perovskite Solar Cells

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