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Wu Y, Wang D, Liu J, Cai H, Zhang Y. Atomic Force Microscope Study of Ag-Conduct Polymer Hybrid Films: Evidence for Light-Induced Charge Separation. NANOMATERIALS 2020; 10:nano10091819. [PMID: 32932650 PMCID: PMC7558113 DOI: 10.3390/nano10091819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 08/28/2020] [Accepted: 09/03/2020] [Indexed: 11/16/2022]
Abstract
Scanning Kelvin probe microscopy (SKPM), electrostatic force microscopy (EFM) are used to study the microscopic processes of the photo-induced charge separation at the interface of Ag and conductive polymers, i.e., poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-bʹ]dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] (PCPDTBT) and poly(3-hexylthiophene-2,5-diyl) (P3HT). They are also widely used in order to directly observe the charge distribution and dynamic changes at the interfaces in nanostructures, owing to their high sensitivity. Using SKPM, it is proved that the charge of the photo-induced polymer PCPDTBT is transferred to Ag nanoparticles (NPs). The surface charge of the Ag-induced NPs is quantified while using EFM, and it is determined that the charge is injected into the polymer P3HT from the Ag NPs. We expect that this technology will provide guidance to facilitate the separation and transfer of the interfacial charges in the composite material systems and it will be applicable to various photovoltaic material systems.
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Chen W, Zhou Y, Wang L, Wu Y, Tu B, Yu B, Liu F, Tam HW, Wang G, Djurišić AB, Huang L, He Z. Molecule-Doped Nickel Oxide: Verified Charge Transfer and Planar Inverted Mixed Cation Perovskite Solar Cell. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1800515. [PMID: 29603421 DOI: 10.1002/adma.201800515] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 02/14/2018] [Indexed: 05/15/2023]
Abstract
Both conductivity and mobility are essential to charge transfer by carrier transport layers (CTLs) in perovskite solar cells (PSCs). The defects derived from generally used ionic doping method lead to the degradation of carrier mobility and parasite recombinations. In this work, a novel molecular doping of NiOx hole transport layer (HTL) is realized successfully by 2,2'-(perfluoronaphthalene-2,6-diylidene)dimalononitrile (F6TCNNQ). Determined by X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy, the Fermi level (EF ) of NiOx HTLs is increased from -4.63 to -5.07 eV and valence band maximum (VBM)-EF declines from 0.58 to 0.29 eV after F6TCNNQ doping. The energy level offset between the VBMs of NiOx and perovskites declines from 0.18 to 0.04 eV. Combining with first-principle calculations, electrostatic force microscopy is applied for the first time to verify direct electron transfer from NiOx to F6TCNNQ. The average power conversion efficiency of CsFAMA mixed cation PSCs is boosted by ≈8% depending on F6TCNNQ-doped NiOx HTLs. Strikingly, the champion cell conversion efficiency of CsFAMA mixed cations and MAPbI3 -based devices gets to 20.86% and 19.75%, respectively. Different from passivation effect, the results offer an extremely promising molecular doping method for inorganic CTLs in PSCs. This methodology definitely paves a novel way to modulate the doping in hybrid electronics more than perovskite and organic solar cells.
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Affiliation(s)
- Wei Chen
- Department of Materials Science and Engineering, Shenzhen Key Laboratory of Full Spectral Solar Electricity Generation (FSSEG), Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Rd, Shenzhen, 518055, Guangdong, P. R. China
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong SAR
| | - Yecheng Zhou
- Department of Physics, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Rd, Shenzhen, 518055, Guangdong, P. R. China
| | - Linjing Wang
- Department of Physics, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Rd, Shenzhen, 518055, Guangdong, P. R. China
| | - Yinghui Wu
- Department of Materials Science and Engineering, Shenzhen Key Laboratory of Full Spectral Solar Electricity Generation (FSSEG), Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Rd, Shenzhen, 518055, Guangdong, P. R. China
| | - Bao Tu
- Department of Materials Science and Engineering, Shenzhen Key Laboratory of Full Spectral Solar Electricity Generation (FSSEG), Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Rd, Shenzhen, 518055, Guangdong, P. R. China
| | - Binbin Yu
- Department of Materials Science and Engineering, Shenzhen Key Laboratory of Full Spectral Solar Electricity Generation (FSSEG), Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Rd, Shenzhen, 518055, Guangdong, P. R. China
| | - Fangzhou Liu
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong SAR
| | - Ho-Won Tam
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong SAR
| | - Gan Wang
- Department of Physics, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Rd, Shenzhen, 518055, Guangdong, P. R. China
| | | | - Li Huang
- Department of Physics, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Rd, Shenzhen, 518055, Guangdong, P. R. China
| | - Zhubing He
- Department of Materials Science and Engineering, Shenzhen Key Laboratory of Full Spectral Solar Electricity Generation (FSSEG), Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Rd, Shenzhen, 518055, Guangdong, P. R. China
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Wang C, Wang K, Qian M, Yu H, Ding G, Liu J. Maintaining nanoimprinting-induced face-on alignment in poly(3-hexylthiophene) nanopillars after thermal annealing. RSC Adv 2017. [DOI: 10.1039/c7ra09667d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The nanoimprinting-induced face-on alignment in poly(3-hexylthiophene) nanopillars is surprisingly maintained after thermal annealing.
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Affiliation(s)
- Chao Wang
- College of Chemistry and Materials Science
- Huaibei Normal University
- Huaibei 235000
- China
- Anhui Key Laboratory of Energetic Materials
| | - Kaixuan Wang
- College of Chemistry and Materials Science
- Huaibei Normal University
- Huaibei 235000
- China
- Anhui Key Laboratory of Energetic Materials
| | - Menxiang Qian
- College of Chemistry and Materials Science
- Huaibei Normal University
- Huaibei 235000
- China
- Anhui Key Laboratory of Energetic Materials
| | - Haiming Yu
- College of Chemistry and Materials Science
- Huaibei Normal University
- Huaibei 235000
- China
- Anhui Key Laboratory of Energetic Materials
| | - Guangzhu Ding
- College of Chemistry and Materials Science
- Huaibei Normal University
- Huaibei 235000
- China
- Anhui Key Laboratory of Energetic Materials
| | - Jieping Liu
- College of Chemistry and Materials Science
- Huaibei Normal University
- Huaibei 235000
- China
- Anhui Key Laboratory of Energetic Materials
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