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Chang J, Xie Y, Shi W, Jiang J, Zhang H, Wang G. The lead-free perovskite-based heterojunction C 2N/CsGeI 3: an exploration for superior visible-light absorption. Phys Chem Chem Phys 2024; 26:17315-17323. [PMID: 38860395 DOI: 10.1039/d4cp01570c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
Halide perovskites have distinguished themselves among the numerous optoelectronic materials due to their versatile processing technology and exceptional optical response. Unfortunately, their stability and toxicity from heavy metals severely hamper their development, in addition to the challenge of further improving photovoltaic performance. Hence, a lead-free perovskite-based heterojunction, C2N/CsGeI3, is investigated using a hybrid density functional, including electron structures, charge density differences, optical properties and more. The study reveals the presence of a built-in electric field directed from the CsGeI3 to the C2N layer. Moreover, based on the work function, it is confirmed that the electrons are transferred in a Z-scheme mechanism after the CsGeI3 contacts with the C2N layer. Under light irradiation, the construction of the C2N/CsGeI3 heterojunction significantly enhances optical absorption within the range of visible-light wavelengths. Additionally, the impact of interfacial strain on the C2N/CsGeI3 is explored and discussed. These findings not only suggest that the C2N/CsGeI3 heterojunction holds promise for photovoltaic applications but also provide a theoretical insight into lead-free perovskite-based functional materials.
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Affiliation(s)
- Junli Chang
- School of Physical Science and Technology, Chongqing Key Laboratory of Micro & Nano Structure Optoelectronics, Southwest University, Chongqing 400715, China.
| | - Yumeng Xie
- School of Physical Science and Technology, Chongqing Key Laboratory of Micro & Nano Structure Optoelectronics, Southwest University, Chongqing 400715, China.
| | - Wenwu Shi
- School of Physical Science and Technology, Chongqing Key Laboratory of Micro & Nano Structure Optoelectronics, Southwest University, Chongqing 400715, China.
| | - Jinguo Jiang
- School of Physical Science and Technology, Chongqing Key Laboratory of Micro & Nano Structure Optoelectronics, Southwest University, Chongqing 400715, China.
| | - Hongyan Zhang
- School of Medical Instrument, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Guangzhao Wang
- Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing, School of Electronic Information Engineering, Yangtze Normal University, Chongqing 408100, China.
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Celestine L, Zosiamliana R, Kima L, Chettri B, Singh YT, Gurung S, Surajkumar Singh N, Laref A, Rai DP. Hybrid-DFT study of halide perovskites, an energy-efficient material under compressive pressure for piezoelectric applications. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2024; 36:325501. [PMID: 38670125 DOI: 10.1088/1361-648x/ad443e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 04/26/2024] [Indexed: 04/28/2024]
Abstract
Recent studies have reported that lead-halide perovskites are the most efficient energy-harvesting materials. Regardless of their high-output energy and structural stability, lead-based products have risk factors due to their toxicity. Therefore, lead-free perovskites that offer green energy are the expected alternatives. We have taken CsGeX3(X = Cl, Br, and I) as lead-free halide perovskites despite knowing the low power conversion rate. Herein, we have tried to study the mechanisms of enhancement of energy-harvesting capabilities involving an interplay between structure and electronic properties. A density functional theory simulation of these materials shows a decrease in the band gaps, lattice parameters, and volumes with increasing applied pressure. We report the high piezoelectric responses and high electro-mechanical conversion rates, which are intriguing for generating electricity through mechanical stress.
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Affiliation(s)
- L Celestine
- Department of Physics, Physical Sciences Research Center (PSRC), Pachhunga University College, Mizoram University, Aizawl 796001, India
- Department of Physics, Mizoram University, Aizawl 796004, India
| | - R Zosiamliana
- Department of Physics, Physical Sciences Research Center (PSRC), Pachhunga University College, Mizoram University, Aizawl 796001, India
- Department of Physics, Mizoram University, Aizawl 796004, India
| | - Lalrin Kima
- Department of Physics, Physical Sciences Research Center (PSRC), Pachhunga University College, Mizoram University, Aizawl 796001, India
- Department of Physics, Mizoram University, Aizawl 796004, India
| | - Bhanu Chettri
- Department of Physics, Physical Sciences Research Center (PSRC), Pachhunga University College, Mizoram University, Aizawl 796001, India
- Department of Physics, North-Eastern Hill University, Shillong, India
| | - Y T Singh
- Department of Physics, Physical Sciences Research Center (PSRC), Pachhunga University College, Mizoram University, Aizawl 796001, India
- Department of Physics, North-Eastern Hill University, Shillong, India
| | - Shivraj Gurung
- Department of Physics, Physical Sciences Research Center (PSRC), Pachhunga University College, Mizoram University, Aizawl 796001, India
| | - N Surajkumar Singh
- Department of Physics, Physical Sciences Research Center (PSRC), Pachhunga University College, Mizoram University, Aizawl 796001, India
| | - A Laref
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - D P Rai
- Department of Physics, Physical Sciences Research Center (PSRC), Pachhunga University College, Mizoram University, Aizawl 796001, India
- Department of Physics, Mizoram University, Aizawl 796004, India
- Researcher, Faculty of Chemical Engineering, New Uzbekistan University, Tashkent, Uzbekistan
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Zheng W, Wang X, Zhang X, Chen B, Suo H, Xing Z, Wang Y, Wei HL, Chen J, Guo Y, Wang F. Emerging Halide Perovskite Ferroelectrics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2205410. [PMID: 36517207 DOI: 10.1002/adma.202205410] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 11/23/2022] [Indexed: 05/26/2023]
Abstract
Halide perovskites have gained tremendous attention in the past decade owing to their excellent properties in optoelectronics. Recently, a fascinating property, ferroelectricity, has been discovered in halide perovskites and quickly attracted widespread interest. Compared with traditional perovskite oxide ferroelectrics, halide perovskites display natural advantages such as structural softness, low weight, and easy processing, which are highly desirable in applications pursuing miniaturization and flexibility. This review focuses on the current research progress in halide perovskite ferroelectrics, encompassing the emerging materials systems and their potential applications in ferroelectric photovoltaics, self-powered photodetection, and X-ray detection. The main challenges and possible solutions in the future development of halide perovskite ferroelectric materials are also attempted to be pointed out.
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Affiliation(s)
- Weilin Zheng
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China
| | - Xiucai Wang
- School of Materials Science and Hydrogen Energy, Foshan University, Foshan, 528000, P. R. China
| | - Xin Zhang
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China
| | - Bing Chen
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China
| | - Hao Suo
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China
| | - Zhifeng Xing
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China
| | - Yanze Wang
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China
| | - Han-Lin Wei
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China
| | - Jiangkun Chen
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China
| | - Yang Guo
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China
| | - Feng Wang
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China
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Zhang M, Xiang G, Wu Y, Liu J, Leng J, Cheng C, Ma H. Influence of Sr doping on the photoelectronic properties of CsPbX 3 (X = Cl, Br, or I): a DFT investigation. Phys Chem Chem Phys 2023; 25:9592-9598. [PMID: 36942656 DOI: 10.1039/d2cp05867g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
Abstract
To broaden the application of cesium lead halide perovskites, doping technology has been widely proposed. In this study, we calculated a 12.5% concentration of a Sr-doped CsPbX3 (X = Cl, Br, or I) perovskite via density functional theory. The results showed that the bandgap energy of the perovskite increased by 0.2-0.3 eV. The high symmetry points of the energy band changed from R to Γ after Sr doping because the Sr doping affected the initial distribution of atomic orbital hybridization. In addition, optical absorption spectra after doping showed an obvious blueshift, whereas the absorption coefficient of CsPb0.875Sr0.125X3 had the same magnitude as undoped CsPbX3. Moreover, the effective masses of electrons and holes changed within a small range (0.01-0.03 m0) after Sr doping. According to the findings of this study, the CsPb0.875Sr0.125X3 perovskite is expected to become an ideal candidate material for designing photovoltaic and photoelectric devices.
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Affiliation(s)
- Man Zhang
- Shandong Provincial Key Laboratory of Optics and Photonic Device & Collaborative Innovation Center of Light Manipulations and Applications, School of Physics and Electronics, Shandong Normal University, Jinan, 250014, China
| | - Guangbiao Xiang
- Shandong Provincial Key Laboratory of Optics and Photonic Device & Collaborative Innovation Center of Light Manipulations and Applications, School of Physics and Electronics, Shandong Normal University, Jinan, 250014, China
| | - Yanwen Wu
- Shandong Provincial Key Laboratory of Optics and Photonic Device & Collaborative Innovation Center of Light Manipulations and Applications, School of Physics and Electronics, Shandong Normal University, Jinan, 250014, China
| | - Jing Liu
- Shandong Provincial Key Laboratory of Optics and Photonic Device & Collaborative Innovation Center of Light Manipulations and Applications, School of Physics and Electronics, Shandong Normal University, Jinan, 250014, China
| | - Jiancai Leng
- Shandong Provincial Key Laboratory of Optics and Photonic Device & Collaborative Innovation Center of Light Manipulations and Applications, School of Physics and Electronics, Shandong Normal University, Jinan, 250014, China
| | - Chen Cheng
- Shandong Provincial Key Laboratory of Optics and Photonic Device & Collaborative Innovation Center of Light Manipulations and Applications, School of Physics and Electronics, Shandong Normal University, Jinan, 250014, China
| | - Hong Ma
- Shandong Provincial Key Laboratory of Optics and Photonic Device & Collaborative Innovation Center of Light Manipulations and Applications, School of Physics and Electronics, Shandong Normal University, Jinan, 250014, China
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Saikia D, Alam M, Bera J, Betal A, Gandi AN, Sahu S. A First‐Principles Study on ABBr
3
(A = Cs, Rb, K, Na; B = Ge, Sn) Halide Perovskites for Photovoltaic Applications. ADVANCED THEORY AND SIMULATIONS 2022. [DOI: 10.1002/adts.202200511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Dibyajyoti Saikia
- Department of Physics Indian Institute of Technology Jodhpur Jodhpur 342037 India
| | - Mahfooz Alam
- Department of Metallurgical and Materials Engineering Indian Institute of Technology Jodhpur Jodhpur 342037 India
| | - Jayanta Bera
- Department of Physics Indian Institute of Technology Jodhpur Jodhpur 342037 India
| | - Atanu Betal
- Department of Physics Indian Institute of Technology Jodhpur Jodhpur 342037 India
| | - Appala Naidu Gandi
- Department of Metallurgical and Materials Engineering Indian Institute of Technology Jodhpur Jodhpur 342037 India
| | - Satyajit Sahu
- Department of Physics Indian Institute of Technology Jodhpur Jodhpur 342037 India
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Thi Han N, Khuong Dien V, Lin MF. Electronic and Optical Properties of CsGeX 3 (X= Cl, Br, and I) Compounds. ACS OMEGA 2022; 7:25210-25218. [PMID: 35910128 PMCID: PMC9330207 DOI: 10.1021/acsomega.2c02088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
We used first-principles calculations to investigate the electrical and optical properties of CsGeX3 (X = Cl, Br, and I) compounds. These materials present rich and unique physical and chemical phenomena, such as the optimal geometric structure, the electronic band structure, the charge density distribution, and the special van Hove singularities in the electronic density of states. The optical properties cover a slight red shift of the optical gap, corresponding to weak electron-hole interactions, strong absorption coefficients, and weak reflectance spectra. The presented theoretical framework will provide a full understanding of the various phenomena and promising applications for solar cells and other electro-optic materials.
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Affiliation(s)
- Nguyen Thi Han
- Department
of Physics, National Cheng Kung University, 701 Tainan, Taiwan
| | - Vo Khuong Dien
- Department
of Physics, National Cheng Kung University, 701 Tainan, Taiwan
| | - Ming-Fa Lin
- Department
of Physics, National Cheng Kung University, 701 Tainan, Taiwan
- Hierarchical
Green-Energy Material (Hi-GEM) Research Center, National Cheng Kung University, 701 Tainan, Taiwan
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