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Zheng Q, Chu W, Zhao C, Zhang L, Guo H, Wang Y, Jiang X, Zhao J. Ab initio nonadiabatic molecular dynamics investigations on the excited carriers in condensed matter systems. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2019. [DOI: 10.1002/wcms.1411] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Qijing Zheng
- ICQD/Hefei National Laboratory for Physical Sciences at Microscale, and Key Laboratory of Strongly‐Coupled Quantum Matter Physics, Chinese Academy of Sciences, and Department of Physics University of Science and Technology of China Hefei China
| | - Weibin Chu
- ICQD/Hefei National Laboratory for Physical Sciences at Microscale, and Key Laboratory of Strongly‐Coupled Quantum Matter Physics, Chinese Academy of Sciences, and Department of Physics University of Science and Technology of China Hefei China
| | - Chuanyu Zhao
- ICQD/Hefei National Laboratory for Physical Sciences at Microscale, and Key Laboratory of Strongly‐Coupled Quantum Matter Physics, Chinese Academy of Sciences, and Department of Physics University of Science and Technology of China Hefei China
| | - Lili Zhang
- ICQD/Hefei National Laboratory for Physical Sciences at Microscale, and Key Laboratory of Strongly‐Coupled Quantum Matter Physics, Chinese Academy of Sciences, and Department of Physics University of Science and Technology of China Hefei China
| | - Hongli Guo
- ICQD/Hefei National Laboratory for Physical Sciences at Microscale, and Key Laboratory of Strongly‐Coupled Quantum Matter Physics, Chinese Academy of Sciences, and Department of Physics University of Science and Technology of China Hefei China
- School of Physics and Technology, Center for Nanoscience and Nanotechnology, and Key Laboratory of Artificial Micro‐ and Nano‐structures of Ministry of Education Wuhan University Wuhan China
| | - Yanan Wang
- ICQD/Hefei National Laboratory for Physical Sciences at Microscale, and Key Laboratory of Strongly‐Coupled Quantum Matter Physics, Chinese Academy of Sciences, and Department of Physics University of Science and Technology of China Hefei China
| | - Xiang Jiang
- ICQD/Hefei National Laboratory for Physical Sciences at Microscale, and Key Laboratory of Strongly‐Coupled Quantum Matter Physics, Chinese Academy of Sciences, and Department of Physics University of Science and Technology of China Hefei China
| | - Jin Zhao
- ICQD/Hefei National Laboratory for Physical Sciences at Microscale, and Key Laboratory of Strongly‐Coupled Quantum Matter Physics, Chinese Academy of Sciences, and Department of Physics University of Science and Technology of China Hefei China
- Department of Physics and Astronomy University of Pittsburgh Pittsburgh Pennsylvania
- Synergetic Innovation Center of Quantum Information & Quantum Physics University of Science and Technology of China Hefei China
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Abstract
We present a subspace surface hopping strategy to deal with complex surface crossings in nonadiabatic dynamics. By focusing on only important adiabatic states, we make subspace crossing correction (SCC) in the framework of the standard fewest switches surface hopping (FSSH) and the global flux surface hopping (GFSH). The resulting SCC-FSSH and SCC-GFSH approaches show much better performance than the counterparts using all adiabatic states for surface hopping. As demonstrated in a series of Holstein models with up to over 1000 molecular sites, both SCC-FSSH and SCC-GFSH show excellent size independence with a large time step size of 1 fs. Especially, SCC-GFSH does not refer to nonadiabatic couplings at all and gives a more proper description of superexchange, and thus, it is promising for realistic applications with complex potential energy surfaces.
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Affiliation(s)
- Jing Qiu
- Center for Chemistry of Novel & High-Performance Materials , and Department of Chemistry , Zhejiang University , Hangzhou 310027 , China
| | - Xin Bai
- Center for Chemistry of Novel & High-Performance Materials , and Department of Chemistry , Zhejiang University , Hangzhou 310027 , China
| | - Linjun Wang
- Center for Chemistry of Novel & High-Performance Materials , and Department of Chemistry , Zhejiang University , Hangzhou 310027 , China
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Wei Y, Zhou Z, Fang WH, Long R. Grain Boundary Facilitates Photocatalytic Reaction in Rutile TiO 2 Despite Fast Charge Recombination: A Time-Domain ab Initio Analysis. J Phys Chem Lett 2018; 9:5884-5889. [PMID: 30247916 DOI: 10.1021/acs.jpclett.8b02761] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
TiO2 is an excellent photocatalytic and photovoltaic material but suffers low efficiency because of deep trap states giving rise to fast charge and energy losses. Using a combination of time-domain density functional theory and nonadiabatic molecular dynamics, we demonstrate that grain boundaries (GBs), which are common in polycrystalline TiO2, accelerate nonradiative electron-hole recombination by a factor of 3. Despite GBs increase the band gap without creating deep trap states, and accelerate coherence loss, they enhance nonadiabatic electron-phonon coupling, and facilitate the relaxation. Importantly, electrons accumulated at the boundaries together with the relatively long-lived excite state favor photocatalytic reaction. Our study rationalizes the experimental observations and provides valuable perspectives for improving the device performance by defect engineering.
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Affiliation(s)
- Yaqing Wei
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education , Beijing Normal University , Beijing , 100875 , P. R. China
| | - Zhaohui Zhou
- Chemical Engineering and Technology, School of Environmental Science and Engineering, and Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education , Chang'an University , Xi'an 710064 , China
| | - Wei-Hai Fang
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education , Beijing Normal University , Beijing , 100875 , P. R. China
| | - Run Long
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education , Beijing Normal University , Beijing , 100875 , P. R. China
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54
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Qiu J, Bai X, Wang L. Crossing Classified and Corrected Fewest Switches Surface Hopping. J Phys Chem Lett 2018; 9:4319-4325. [PMID: 30011207 DOI: 10.1021/acs.jpclett.8b01902] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In the traditional fewest switches surface hopping (FSSH), trivial crossings between uncoupled or weakly coupled states have highly peaked nonadiabatic couplings and thus are difficult to deal with in the preferred, adiabatic representation. Here, we classify surface crossings into four general types and propose a parameter-free crossing corrected FSSH (CC-FSSH) algorithm, which could treat multiple trivial crossings within a time interval. As examples, Holstein Hamiltonians with different parameters are adopted to mimic electron dynamics in tens to hundreds of molecules, which suffer from severe trivial crossing problems. Using existed surface hopping approaches as references, we show that CC-FSSH exhibits significantly fast time interval convergence and weak system size dependence. In all cases, a reliable description is achieved with a large time interval of 1 fs. With a simple formalism and the ability to describe complex surface crossings, CC-FSSH could potentially simulate general nonadiabatic dynamics in nanoscale materials with a high efficiency.
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Affiliation(s)
- Jing Qiu
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , China
| | - Xin Bai
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , China
| | - Linjun Wang
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , China
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55
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Jin H, Li J, Wei Y, Dai Y, Guo H. Unraveling the Mechanism of Photoinduced Charge-Transfer Process in Bilayer Heterojunction. ACS APPLIED MATERIALS & INTERFACES 2018; 10:25401-25408. [PMID: 29987925 DOI: 10.1021/acsami.8b07138] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Charge transfer is a fundamental process that determines the performance of solar cell devices. Although great efforts have been made, the detailed mechanism of charge-transfer process across the two-dimensional van der Waals (vdW) heterostructure remains elusive. Here, on the basis of the ab initio nonadiabatic molecular dynamics simulation, we model the photoinduced charge-transfer dynamics at the InSe/InTe vdW heterostructures. Our results show that carriers can follow either the R-scheme or Z-scheme transfer path, depending on the coupling between the interlayer states at the band-edge positions. In addition, the charge-transfer dynamics can be effectively controlled by the external parameters, such as strains and interlayer stacking configurations. The predicated electron-hole recombination lifetime in the R-scheme transfer path is up to 1.4 ns, whereas it is shortened to 1.2 ps in the Z-scheme transfer path. The proposed R-scheme and Z-scheme are further verified by the quantum transport simulations on the basis of the density functional theory (DFT) method combined with nonequilibrium Green's functions (NEGF-DFT). The analysis reveals that the system dominated by the Z-scheme shows better performance, which can be attributed to the built-in electric field that facilitates the charge transfer. Our work may pave the way for the designing of next-generation devices for light detecting and harvesting.
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Affiliation(s)
- Hao Jin
- Shenzhen Key Laboratory of Advanced Thin Films and Applications, College of Physics and Energy , Shenzhen University , Shenzhen 518060 , People's Republic of China
| | - Jianwei Li
- Shenzhen Key Laboratory of Advanced Thin Films and Applications, College of Physics and Energy , Shenzhen University , Shenzhen 518060 , People's Republic of China
| | - Yadong Wei
- Shenzhen Key Laboratory of Advanced Thin Films and Applications, College of Physics and Energy , Shenzhen University , Shenzhen 518060 , People's Republic of China
| | - Ying Dai
- School of Physics, State Key Laboratory of Crystal Materials , Shandong University , Jinan 250100 , People's Republic of China
| | - Hong Guo
- Shenzhen Key Laboratory of Advanced Thin Films and Applications, College of Physics and Energy , Shenzhen University , Shenzhen 518060 , People's Republic of China
- Centre for the Physics of Materials and Department of Physics , McGill University , Montréal H3A 2T8 , Canada
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Wei Y, Long R. Grain Boundaries Are Benign and Suppress Nonradiative Electron-Hole Recombination in Monolayer Black Phosphorus: A Time-Domain Ab Initio Study. J Phys Chem Lett 2018; 9:3856-3862. [PMID: 29952569 DOI: 10.1021/acs.jpclett.8b01654] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Using time-domain density functional theory combined with nonadiabatic molecular dynamics, we demonstrate that both symmetrical (GB_s) and asymmetrical grain boundaries (GB_a) significantly extend charge-carrier lifetime compared with monolayer black phosphorus. Boundaries create no deep trap states, which decrease electron-phonon coupling. As a result, GB_s increases carrier lifetime by a factor of 22, whereas GB_a extends the lifetime by a factor of 4. More importantly, the interplay between the immobile electron localized at the boundaries in the GB_s and extended excited-state lifetime facilitates a chemical reaction, which is beneficial for photocatalysts. In contrast, GB_a separates electron and hole spatially in different locations, which forms a long-lived charge-separated state and is favorable for photovoltaics. Our simulations demonstrate that grain boundaries are benign and retard nonradiative electron-hole recombination in monolayer black phosphorus, suggesting a route to reduce energy losses via rational choice of defect to realize high-performance photovoltaic and photocatalytic devices.
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Affiliation(s)
- Yaqing Wei
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education , Beijing Normal University , Beijing 100875 , P. R. China
| | - Run Long
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education , Beijing Normal University , Beijing 100875 , P. R. China
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Bai X, Qiu J, Wang L. An efficient solution to the decoherence enhanced trivial crossing problem in surface hopping. J Chem Phys 2018; 148:104106. [PMID: 29544303 DOI: 10.1063/1.5020693] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
We provide an in-depth investigation of the time interval convergence when both trivial crossing and decoherence corrections are applied to Tully's fewest switches surface hopping (FSSH) algorithm. Using one force-based and one energy-based decoherence strategies as examples, we show decoherence corrections intrinsically enhance the trivial crossing problem. We propose a restricted decoherence (RD) strategy and incorporate it into the self-consistent (SC) fewest switches surface hopping algorithm [L. Wang and O. V. Prezhdo, J. Phys. Chem. Lett. 5, 713 (2014)]. The resulting SC-FSSH-RD approach is applied to general Hamiltonians with different electronic couplings and electron-phonon couplings to mimic charge transport in tens to hundreds of molecules. In all cases, SC-FSSH-RD allows us to use a large time interval of 0.1 fs for convergence and the simulation time is reduced by over one order of magnitude. Both the band and hopping mechanisms of charge transport have been captured perfectly. SC-FSSH-RD makes surface hops in the adiabatic representation and can be implemented in both diabatic and locally diabatic representations for wave function propagation. SC-FSSH-RD can potentially describe general nonadiabatic dynamics of electrons and excitons in organics and other materials.
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Affiliation(s)
- Xin Bai
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Jing Qiu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Linjun Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
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