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Thakur D, Ke QB, Chiang SE, Tseng TH, Cai KB, Yuan CT, Wang JS, Chang SH. Stable and efficient soft perovskite crystalline film based solar cells prepared with a facile encapsulation method. NANOSCALE 2022; 14:17625-17632. [PMID: 36412495 DOI: 10.1039/d2nr04917a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The quasi Fermi level for electrons in a soft perovskite crystalline thin film and the contact qualities at the PCBM/perovskite and perovskite/P3CT-Na interfaces can be increased using a facile encapsulation method, which improves the device performance and stability of the resultant perovskite solar cells. In the encapsulated perovskite solar cells, the averaged open-circuit voltage (VOC) largely increases from 0.981 V to 1.090 V after 9 days mainly due to the increased quasi Fermi levels. Besides, the reflectance and photoluminescence (PL) spectra show improved contact qualities at the PCBM/perovskite and perovskite/P3CT-Na interfaces, which can be used to explain the increase in the short-circuit current density (JSC) from 21.68 mA cm-2 to 23.48 mA cm-2 after the encapsulation process. Besides, nanosecond time-resolved PL and temperature-dependent PL spectra can be used to explain the increased VOC, which is mainly due to the increased shallow defect density and thereby increasing the exciton binding energy of the encapsulated perovskite sample. It is noted that the averaged power conversion efficiency (PCE) slowly decreases from 18.24% to 16.52% within 45 days.
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Affiliation(s)
- Diksha Thakur
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan, Republic of China.
- Center for Nano Technology and R&D Center for Membrane Technology, Chung Yuan Christian University, Taoyuan 320314, Taiwan, Republic of China
| | - Qi Bin Ke
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan, Republic of China.
- Research Center for Semiconductor Materials and Advanced Optics, Taoyuan 320314, Taiwan, Republic of China
- Center for Nano Technology and R&D Center for Membrane Technology, Chung Yuan Christian University, Taoyuan 320314, Taiwan, Republic of China
| | - Shou-En Chiang
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan, Republic of China.
- Research Center for Semiconductor Materials and Advanced Optics, Taoyuan 320314, Taiwan, Republic of China
- Center for Nano Technology and R&D Center for Membrane Technology, Chung Yuan Christian University, Taoyuan 320314, Taiwan, Republic of China
| | - Tzu-Han Tseng
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan, Republic of China.
| | - Kun-Bin Cai
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan, Republic of China.
| | - Chi-Tsu Yuan
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan, Republic of China.
- Research Center for Semiconductor Materials and Advanced Optics, Taoyuan 320314, Taiwan, Republic of China
| | - Jyh-Shyang Wang
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan, Republic of China.
- Research Center for Semiconductor Materials and Advanced Optics, Taoyuan 320314, Taiwan, Republic of China
| | - Sheng Hsiung Chang
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan, Republic of China.
- Research Center for Semiconductor Materials and Advanced Optics, Taoyuan 320314, Taiwan, Republic of China
- Center for Nano Technology and R&D Center for Membrane Technology, Chung Yuan Christian University, Taoyuan 320314, Taiwan, Republic of China
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Chiang SE, Lin PC, Wu JR, Chang SH. Improving the photovoltaic performance of inverted perovskite solar cells via manipulating the molecular packing structure of PCBM. NANOTECHNOLOGY 2022; 34:015401. [PMID: 36174453 DOI: 10.1088/1361-6528/ac962b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 09/28/2022] [Indexed: 06/16/2023]
Abstract
In this study, the molecular packing structure of solution-processed phenyl-C61-butyric acid methyl ester (PCBM) thin film was manipulated by varying the volume ratio of chlorobenzene (CB) to bromobenzene (BrB) from 100:0 to 50:50, which largely influences the device performance of the PCBM/perovskite heterojunction solar cells. Absorbance spectra, photoluminescence spectra, atomic force microscopic images and contact angle images were used to investigate the molecular packing structure effects of the PCBM thin films on the device performance of the inverted perovskite solar cells. Our experimental results show that the formation of PCBM aggregates and the contact quality at the PCBM/perovksite interface significantly influence the open-circuit voltage, short-circuit current density and fill factor of the resultant solar cells simultaneously. It is noted that the PCE of the encapsulated inverted CH3NH3PbI3(MAPbI3) solar cells exhibited a stable and high power conversion efficiency of 18%.
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Affiliation(s)
- Shou-En Chiang
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan, ROC
- Research Center for Semiconductor Materials and Advanced Optics, Chung Yuan Christian University, Taoyuan 320314, Taiwan, ROC
- R&D Center for Membrane Technology and Center for Nanotechnology, Chung Yuan Christian University, Taoyuan 320314, Taiwan, ROC
| | - Pei-Chen Lin
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan, ROC
| | - Jia-Ren Wu
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan, ROC
- Research Center for Semiconductor Materials and Advanced Optics, Chung Yuan Christian University, Taoyuan 320314, Taiwan, ROC
- R&D Center for Membrane Technology and Center for Nanotechnology, Chung Yuan Christian University, Taoyuan 320314, Taiwan, ROC
| | - Sheng Hsiung Chang
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan, ROC
- Research Center for Semiconductor Materials and Advanced Optics, Chung Yuan Christian University, Taoyuan 320314, Taiwan, ROC
- R&D Center for Membrane Technology and Center for Nanotechnology, Chung Yuan Christian University, Taoyuan 320314, Taiwan, ROC
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Ke QB, Wu JR, Lin CC, Chang SH. Understanding the PEDOT:PSS, PTAA and P3CT-X Hole-Transport-Layer-Based Inverted Perovskite Solar Cells. Polymers (Basel) 2022; 14:polym14040823. [PMID: 35215736 PMCID: PMC8963032 DOI: 10.3390/polym14040823] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/15/2022] [Accepted: 02/17/2022] [Indexed: 01/18/2023] Open
Abstract
The power conversion efficiencies (PCEs) of metal-oxide-based regular perovskite solar cells have been higher than 25% for more than 2 years. Up to now, the PCEs of polymer-based inverted perovskite solar cells are widely lower than 23%. PEDOT:PSS thin films, modified PTAA thin films and P3CT thin films are widely used as the hole transport layer or hole modification layer of the highlyefficient inverted perovskite solar cells. Compared with regular perovskite solar cells, polymer-based inverted perovskite solar cells can be fabricated under relatively low temperatures. However, the intrinsic characteristics of carrier transportation in the two types of solar cells are different, which limits the photovoltaic performance of inverted perovskite solar cells. Thanks to the low activation energies for the formation of high-quality perovskite crystalline thin films, it is possible to manipulate the optoelectronic properties by controlling the crystal orientation with the different polymer-modified ITO/glass substrates. To achieve the higher PCE, the effects of polymer-modified ITO/glass substrates on the optoelectronic properties and the formation of perovskite crystalline thin films have to be completely understood simultaneously.
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Affiliation(s)
- Qi Bin Ke
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan; (Q.B.K.); (J.-R.W.); (C.-C.L.)
| | - Jia-Ren Wu
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan; (Q.B.K.); (J.-R.W.); (C.-C.L.)
| | - Chia-Chen Lin
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan; (Q.B.K.); (J.-R.W.); (C.-C.L.)
| | - Sheng Hsiung Chang
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan; (Q.B.K.); (J.-R.W.); (C.-C.L.)
- R&D Center for Membrane Technology and Center for Nano Technology, Chung Yuan Christian University, Taoyuan 320314, Taiwan
- Correspondence:
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