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Gong J, Adnani M, Jones BT, Xin Y, Wang S, Patel SV, Lochner E, Mattoussi H, Hu YY, Gao H. Nanoscale Encapsulation of Hybrid Perovskites Using Hybrid Atomic Layer Deposition. J Phys Chem Lett 2022; 13:4082-4089. [PMID: 35499488 DOI: 10.1021/acs.jpclett.2c00862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Organic-inorganic hybrid perovskites have shown tremendous potential for optoelectronic applications. Ion migration within the crystal and across heterointerfaces, however, imposed severe problems with material degradation and performance loss in devices. Encapsulating hybrid perovskite with a thin physical barrier can be essential for suppressing the undesirable interfacial reactions without inhibiting the desirable transport of charge carriers. Here, we demonstrated that nanoscale, pinhole-free Al2O3 layer can be coated directly on the perovskite CH3NH3PbI3 using atomic layer deposition (ALD). The success can be attributed to a multitude of strategies including surface molecular modification and hybrid ALD processing combining the thermal and plasma-enhanced modes. The Al2O3 films provided remarkable protection to the underlying perovskite films, surviving by hours in solvents without noticeable decays in either structural or optical properties. The results advanced the understanding of applying ALD directly on hybrid perovskite and provided new opportunities to implement stable and high-performance devices based on the perovskites.
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Affiliation(s)
- Jue Gong
- Department of Physics, Florida State University, Tallahassee, Florida 32306, United States
| | - Moein Adnani
- Department of Physics, Florida State University, Tallahassee, Florida 32306, United States
| | - Brendon T Jones
- Department of Physics, Florida State University, Tallahassee, Florida 32306, United States
| | - Yan Xin
- Condensed Matter Science, National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
| | - Sisi Wang
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Sawankumar V Patel
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Eric Lochner
- Department of Physics, Florida State University, Tallahassee, Florida 32306, United States
| | - Hedi Mattoussi
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Yan-Yan Hu
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
- Materials Science and Engineering Program, Florida State University, Tallahassee, Florida 32306, United States
| | - Hanwei Gao
- Department of Physics, Florida State University, Tallahassee, Florida 32306, United States
- Condensed Matter Science, National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
- Materials Science and Engineering Program, Florida State University, Tallahassee, Florida 32306, United States
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Su K, Zhao P, Ren Y, Zhang Y, Yang G, Huang Y, Feng Y, Zhang B. A Porphyrin-Involved Benzene-1,3,5-Tricarboxamide Dendrimer (Por-BTA) as a Multifunctional Interface Material for Efficient and Stable Perovskite Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2021; 13:14248-14257. [PMID: 33734692 DOI: 10.1021/acsami.1c00146] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Surface defects of perovskite films are the major sources of nonradiative recombination which limit the efficiency and stability of perovskite solar cells. Surface passivation represents one of the most efficient strategies to solve this problem. Herein, for the first time we designed a porphyrin-involved benzene-1,3,5-tricarboxamide dendrimer (Por-BTA) as a multifunctional interface material between the interface of the perovskite and the hole-transporting layer (spiro-OMeTAD) for the surface passivation of perovskite films. The results suggested that Por-BTA not only efficiently passivated the perovskite surface defects via the coordination of the exposed Pb2+ with the carbonyl unit and basic sites of pyrrole units in Por-BTA but also improved the interface contact and the charge transfer between the perovskite and spiro-OMeTAD ascribed to the strong intermolecular π-π stacking of Por-BTA. It was shown that the PSC devices with the Por-BTA treatment exhibited improved power conversion efficiency with the champion of 22.30% achieved (21.30% for the control devices), which is mainly attributed to the increased short-circuit current density and fill factor. Interestingly, the stability of moisture for the Por-BTA-treated device was also enhanced compared to those without the Por-BTA treatment. This work presents a promising direction toward the design of multifunctional organic molecules as the interface materials to improve the cell performance of PSCs.
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Affiliation(s)
- Kuo Su
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
- Tianjin Co-Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Peng Zhao
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Yu Ren
- Shanghai Research Institute of Chemical Industry Co. Ltd., Shanghai 200062, China
| | - Yi Zhang
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL Valais Wallis), Sion CH-1951, Switzerland
| | - Guang Yang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Yuqiong Huang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Yaqing Feng
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
- Tianjin Co-Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Bao Zhang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
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