1
|
Shin Y, Kim H, Bae JH, Lee C, Kim T, Han D, Yoon SJ. Operando spectroscopic characterization of formamidinium lead iodide perovskite quantum dots for tracking electrochemical reactions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 308:123779. [PMID: 38128323 DOI: 10.1016/j.saa.2023.123779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 12/06/2023] [Accepted: 12/15/2023] [Indexed: 12/23/2023]
Abstract
Multidimensional ABX3 hybrid perovskites three-dimensionally confined dot-shaped structure demonstrate versatile potential to photoelectrochemical cells for water splitting, hydrogen generation, solar cells, and light-emitting diodes. To apply perovskite quantum dots (PQDs) to solar-driven chemistry and optoelectronic devices, understanding the photoinduced charge carrier dynamics of PQDs under electrochemical conditions or applied bias are important. In this study, the detailed transformation mechanism of formamidinium lead iodide perovskite quantum dots under electrochemical conditions was studied by tracking the products of the reaction through cyclic voltammetry, X-ray photoemission spectroscopy, in-situ UV-visible spectroelectrochemistry, etc. Through comprehensive characterizations, the mechanism of irreversible oxidative transformation of perovskite quantum dots was presented. This study provides deeper insight into the electrochemical behavior of PQDs for successful solar-driven chemistry and optoelectronic device applications.
Collapse
Affiliation(s)
- YeJi Shin
- Department of Chemistry, College of Natural Science, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk-do 38541, Republic of Korea
| | - Hyoin Kim
- Department of Chemistry, The Catholic University of Korea, Bucheon, Gyeonggi-do 14662, Republic of Korea
| | - Je Hyun Bae
- Graduate School of Analytical Science and Technology (GRAST), Chungnam National University, Daejeon 34134, Republic of Korea
| | - ChaeHyun Lee
- Department of Chemistry, College of Natural Science, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk-do 38541, Republic of Korea
| | - Taeyeon Kim
- Department of Chemistry, College of Natural Science, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk-do 38541, Republic of Korea
| | - Donghoon Han
- Department of Chemistry, The Catholic University of Korea, Bucheon, Gyeonggi-do 14662, Republic of Korea.
| | - Seog Joon Yoon
- Department of Chemistry, College of Natural Science, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk-do 38541, Republic of Korea.
| |
Collapse
|
2
|
Iftikhar R, Irshad R, Zahid WA, Akram W, Shehzad RA, Abdelmohsen SAM, Alanazi MM, Shahzad N, Iqbal J. Designing of fluorine-substituted benzodithiophene-based small molecules with efficient photovoltaic parameters. J Mol Graph Model 2023; 125:108588. [PMID: 37557026 DOI: 10.1016/j.jmgm.2023.108588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 07/17/2023] [Accepted: 08/02/2023] [Indexed: 08/11/2023]
Abstract
In this study, four hole-transporting materials (JY-M1, JY-M2, JY-M3, and JY-M4) are designed by modifying benzothiadiazole-based core with diphenylamine-based carbazole via acceptors through thiophene linkers. The designed molecules exhibited deeper HOMO energy with smaller energy gaps than the reference JY molecule which enhance their hole mobility. The absorption spectra of the JY-M1, JY-M2, JY-M3, and JY-M4 molecules are located at 380 nm to 407 nm in the gaseous phase and 397 nm to 433 nm in the solvent phase, which is red-shifted and higher than the reference molecule, demonstrating that designed molecules possess improved light absorption properties and enhanced effective hole transfer. The dipole moments of the designed molecules (14.74 D to 26.12 D) indicate a greater ability for charge separation, solubility and will be beneficial to produce multilayer films. Moreover, the results of hole reorganization energy (0.38198 eV to 0.45304 eV) and charge transfer integral (0.14315 eV to 0.14665 eV) of designing molecules show improved hole mobility and lower recombination losses compared to the JY molecule. Overall, we suggested that the structural modifications in the designed molecules contributed to their enhanced efficiency in converting light energy into electrical energy and have the potential for utilization in solar devices, paving the way for future advancements in the field of photovoltaics.
Collapse
Affiliation(s)
- Rabia Iftikhar
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Rabiya Irshad
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Waqar Ali Zahid
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Waqas Akram
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Rao Aqil Shehzad
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Shaimaa A M Abdelmohsen
- Department of Physics, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh, 11671, Saudi Arabia
| | - Meznah M Alanazi
- Department of Physics, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh, 11671, Saudi Arabia
| | - Nabeel Shahzad
- Department of Chemistry, Government College University, Faisalabad, Pakistan
| | - Javed Iqbal
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan.
| |
Collapse
|