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Wang Y, Cao Q, Xiang X, Yu J, Zhou J. Tailoring the Buried Interface by Dipolar Halogen-Substituted Arylamine for Efficient and Stable Perovskite Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38477104 DOI: 10.1021/acsami.4c00606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/14/2024]
Abstract
Improving the quality of the buried interface is decisive for achieving stable and high-efficiency perovskite solar cells. Herein, we report the interface engineering by using dipolar 2,4-difluoro-3,5-dichloroaniline (DDE) as the adhesive between titanium dioxide (TiO2) and MAPbI3. By manipulation of the anchoring groups of DDE, this molecule not only passivated defects of TiO2 but also optimized the energy level alignment. Furthermore, the perovskite film on the modified TiO2 surface showed improved crystallinity, released residual stress, and reduced trap states. Therefore, these benefits directly contribute to achieving a power conversion efficiency of up to 22.10%. The unencapsulated device retained 90% of initial power conversion efficiencies (PCE) after continuous light illumination for 1000 h and 93% of initial PCE after exposure to air with a relative humidity of 30-40% for over 3000 h. Moreover, the performance of PSCs based on FA0.15MA0.85PbI3 has also increased from 20.48 to 23.51%. Our results demonstrate the effectiveness and universality of dipolar halogen-substituted arylamine (DDE) for enhancing PSC performance.
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Affiliation(s)
- Yan Wang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Qin Cao
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Xuwu Xiang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Jiangsheng Yu
- School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Jie Zhou
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
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2
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Pecoraro A, Muñoz-García AB, Sannino GV, Veneri PD, Pavone M. Exotic hexagonal NaCl atom-thin layer on methylammonium lead iodide perovskite: new hints for perovskite solar cells from first-principles calculations. Phys Chem Chem Phys 2024; 26:1602-1607. [PMID: 38165025 DOI: 10.1039/d3cp02712k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
Alkali halides are simple inorganic compounds extensively used as surface modifiers in optoelectronic devices. In perovskite solar cells (PSCs), they act as interlayers between the light absorber material and the charge selective layers improving their contact quality. They introduce surface dipoles that enable the fine tuning of the relative band alignment and passivate surface defects, a well-known drawback of hybrid organic-inorganic perovskites, that is responsible for most of the issues hampering the long-term performances. Reducing the thickness of such salt-based insulating layer might be beneficial in terms of charge transfer between the perovskite and the electron/hole transport layers. In this context, here we apply density functional theory (DFT) to characterize the structure and the electronic features of atom-thin layers of NaCl adsorbed on the methylammonium lead iodide (MAPI) perovskite. We analyze two different models of MAPI surface terminations and find unexpected structural reconstructions arising at the interface. Unexpectedly, we find an exotic honeycomb-like structuring of the salt, also recently observed in experiments on a diamond substrate. We also investigate how the salt affects the perovskite electronic properties that are key to control the charge dynamics at the interface. Moreover, we also assess the salt ability to improve the defect tolerance of the perovskite surface. With these results, we derive new hints regarding the potential benefits of using an atom-thin layer of alkali halides in PSCs.
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Affiliation(s)
- Adriana Pecoraro
- Department of Physics "E. Pancini", University of Naples Federico II, Napoli, Italy.
- INSTM-GISEL, National Interuniversity Consortium of Materials Science and Technology (INSTM), Florence, Italy.
| | - Ana B Muñoz-García
- Department of Physics "E. Pancini", University of Naples Federico II, Napoli, Italy.
- INSTM-GISEL, National Interuniversity Consortium of Materials Science and Technology (INSTM), Florence, Italy.
| | - Gennaro V Sannino
- Department of Chemical Sciences, University of Naples Federico II, Napoli, Italy
- Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Portici (NA), Italy
| | - Paola Delli Veneri
- Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Portici (NA), Italy
| | - Michele Pavone
- INSTM-GISEL, National Interuniversity Consortium of Materials Science and Technology (INSTM), Florence, Italy.
- Department of Chemical Sciences, University of Naples Federico II, Napoli, Italy
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Liu H, Xiang L, Gao P, Wang D, Yang J, Chen X, Li S, Shi Y, Gao F, Zhang Y. Improvement Strategies for Stability and Efficiency of Perovskite Solar Cells. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12193295. [PMID: 36234422 PMCID: PMC9565258 DOI: 10.3390/nano12193295] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 08/17/2022] [Accepted: 09/20/2022] [Indexed: 05/31/2023]
Abstract
Recently, perovskites have garnered great attention owing to their outstanding characteristics, such as tunable bandgap, rapid absorption reaction, low cost and solution-based processing, leading to the development of high-quality and low-cost photovoltaic devices. However, the key challenges, such as stability, large-area processing, and toxicity, hinder the commercialization of perovskite solar cells (PSCs). In recent years, several studies have been carried out to overcome these issues and realize the commercialization of PSCs. Herein, the stability and photovoltaic efficiency improvement strategies of perovskite solar cells are briefly summarized from several directions, such as precursor doping, selection of hole/electron transport layer, tandem solar cell structure, and graphene-based PSCs. According to reference and analysis, we present our perspective on the future research directions and challenges of PSCs.
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Affiliation(s)
- Hongliang Liu
- Guangdong Engineering Research Center of Optoelectronic Functional Materials and Devices, South China Normal University, Guangzhou 510631, China
| | - Ling Xiang
- Guangdong Engineering Research Center of Optoelectronic Functional Materials and Devices, South China Normal University, Guangzhou 510631, China
| | - Peng Gao
- Tianjin Institute of Power Sources, Tianjin 300384, China
| | - Dan Wang
- Guangdong Engineering Research Center of Optoelectronic Functional Materials and Devices, South China Normal University, Guangzhou 510631, China
| | - Jirui Yang
- Guangdong Engineering Research Center of Optoelectronic Functional Materials and Devices, South China Normal University, Guangzhou 510631, China
| | - Xinman Chen
- Guangdong Engineering Research Center of Optoelectronic Functional Materials and Devices, South China Normal University, Guangzhou 510631, China
| | - Shuti Li
- Guangdong Engineering Research Center of Optoelectronic Functional Materials and Devices, South China Normal University, Guangzhou 510631, China
| | - Yanli Shi
- Library of South China Agricultural University, Guangzhou 510642, China
| | - Fangliang Gao
- Guangdong Engineering Research Center of Optoelectronic Functional Materials and Devices, South China Normal University, Guangzhou 510631, China
| | - Yong Zhang
- Guangdong Engineering Research Center of Optoelectronic Functional Materials and Devices, South China Normal University, Guangzhou 510631, China
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4
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Chan TH, Taylor NT, Sundaram S, Hepplestone SP. Phase Stability and Electronic Properties of Hybrid Organic-Inorganic Perovskite Solid Solution (CH(NH 2) 2) x (CH 3NH 3) 1-x Pb(Br y I 1-y ) 3 as a Function of Composition. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:13640-13648. [PMID: 36017360 PMCID: PMC9393887 DOI: 10.1021/acs.jpcc.2c03555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 07/10/2022] [Indexed: 06/15/2023]
Abstract
Compositional mixing provides the means to maintain the structural stability of a hybrid organic-inorganic perovskite for efficient and robust photovoltaic applications. Here we present a theoretical, first-principles study of the electronic and energetic properties of the solid solution (CH(NH2)2) x (CH3NH3)1-x PbBr y I1-y , the mixing of two organic molecules with various orientations, formamidinium and methylammonium, and two halides, bromide and iodide. Our results show the variation in the band gap as a function of composition (x and y) provides several candidates that exceed the 27.5% Schockley-Queisser efficiency. The variation in the composition of hybrid perovskite shows specific regions where either the hexagonal or cubic phase dominates. We discuss the balance between the band gap and phase stability and indicate regions where the phase transition temperature between cubic and hexagonal phases is far from room temperature, indicating that these compositions are more robust at room temperature against phase transitions.
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Affiliation(s)
- T. H. Chan
- Department
of Physics and Astronomy, College of Engineering, Mathematics and
Physical Sciences, Streatham Campus, University
of Exeter, Exeter EX4 4QL, U.K.
| | - N. T. Taylor
- Department
of Physics and Astronomy, College of Engineering, Mathematics and
Physical Sciences, Streatham Campus, University
of Exeter, Exeter EX4 4QL, U.K.
| | - S. Sundaram
- The
School of Engineering and the Built Environment, Merchiston Campus, Edinburgh Napier University, Edinburgh EH10 5DT, U.K.
| | - S. P. Hepplestone
- Department
of Physics and Astronomy, College of Engineering, Mathematics and
Physical Sciences, Streatham Campus, University
of Exeter, Exeter EX4 4QL, U.K.
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Xi J, Yuan J, Du J, Yan X, Tian J. Efficient Perovskite Solar Cells Based on Tin Oxide Nanocrystals with Difunctional Modification. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2203519. [PMID: 35858226 DOI: 10.1002/smll.202203519] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 07/02/2022] [Indexed: 06/15/2023]
Abstract
Tin oxide (SnO2 ) nanocrystals-based electron transport layer (ETL) has been widely used in perovskite solar cells due to its high charge mobility and suitable energy band alignment with perovskite, but the high surface trap density of SnO2 nanocrystals harms the electron transfer and collection within device. Here, an effective method to achieve a low trap density and high electron mobility ETL based on SnO2 nanocrystals by devising a difunctional additive of potassium trifluoroacetate (KTFA) is proposed. KTFA is added to the SnO2 nanocrystals solution, in which trifluoroacetate ions could effectively passivate the oxygen vacancies (OV ) in SnO2 nanocrystals through binding of TFA- and Sn4+ , thus reducing the traps of SnO2 nanocrystals to boost the electrons collection in the solar cell. Furthermore, the conduction band of SnO2 nanocrystals is shifted up by surface modification to close to that of perovskite, which facilitates electrons transfer because of the decreased energy barrier between ETL and perovskite layer. Benefiting from the decreased trap density and energy barrier, the perovskite solar cells exhibit a power conversion efficiency of 21.73% with negligible hysteresis.
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Affiliation(s)
- Jiahao Xi
- Institute for Advanced Materials and Technology, University of Science and Technology, Beijing, 100083, P. R. China
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, P. R. China
| | - Jifeng Yuan
- Institute for Advanced Materials and Technology, University of Science and Technology, Beijing, 100083, P. R. China
| | - Jiuyao Du
- Institute for Advanced Materials and Technology, University of Science and Technology, Beijing, 100083, P. R. China
| | - Xiaoqin Yan
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, P. R. China
| | - Jianjun Tian
- Institute for Advanced Materials and Technology, University of Science and Technology, Beijing, 100083, P. R. China
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Conformal Loading Effects of P3CT-Na Polymers on the Performance of Inverted Perovskite Solar Cells. Processes (Basel) 2022. [DOI: 10.3390/pr10081444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The conformal loading effects of P3CT-Na polymers on ITO/glass samples were investigated using different concentrations of P3TC-Na/water solution, which significantly influenced the device efficiency of the resultant inverted perovskite solar cells. The obtained water-droplet contact angle images, surface morphological images, photoluminescence spectra and X-ray diffraction patterns show that the hydrophilic moiety of the P3CT-Na polymers plays an important role in the conformal loading effects, thereby resulting in a smoother perovskite crystalline film due to the formation of merged grains. It is noted that the average power conversion efficiency increases from 14.83% to 17.27% with a decrease in the concentration of the P3CT-Na/water solution from 60 wt% to 48 wt%.
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Li Y, Dong YJ, He H, Chen XL, Jiang H, Jia Y. Study on the long time aging behavior of MAPbI 3: from experiment to first-principles simulation. RSC Adv 2022; 12:32979-32985. [DOI: 10.1039/d2ra05378k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Accepted: 11/02/2022] [Indexed: 11/17/2022] Open
Abstract
Both defect passivation and preventing ion diffusion are necessary for reaching the stable perovskite film.
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Affiliation(s)
- Yan Li
- School of Materials Science and Engineering, Xi'an Shiyou University, Xi'an, 710065, China
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710065, China
| | - Yu-Jing Dong
- Key Laboratory for Special Functional Materials of Ministry of Education, School of Materials, Center for Topological Functional Materials, School of Physics and Electronic, Henan University, Kaifeng 475001, China
- School of Science and Technology, Xinyang College, Xinyang 464000, China
| | - Hong He
- School of Materials Science and Engineering, Xi'an Shiyou University, Xi'an, 710065, China
| | - Xue-Lian Chen
- School of Materials Science and Engineering, Xi'an Shiyou University, Xi'an, 710065, China
| | - Hao Jiang
- School of Materials Science and Engineering, Xi'an Shiyou University, Xi'an, 710065, China
| | - Yu Jia
- Key Laboratory for Special Functional Materials of Ministry of Education, School of Materials, Center for Topological Functional Materials, School of Physics and Electronic, Henan University, Kaifeng 475001, China
- International Laboratory for Quantum Functional Materials of Henan, School of Physics, Zhengzhou University, Zhengzhou 450001, China
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