Ultrafast Study of Interfacial Charge Transfer Mechanism in Assembled Systems of CsPbBr<sub>3</sub> and Titanium Dioxide: Size Effect of CsPbBr<sub>3</sub>
Lead halide perovskite quantum dots, also known as perovskite nanocrystals, are considered one of the most promising photovoltaic materials for solar cells due to their outstanding optoelectronic properties and simple preparation techniques. The key factors restricting the photoelectric conversion e...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-07-01
|
| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/15/14/1065 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850071615370428416 |
|---|---|
| author | Ying Lv Menghan Duan Jie An Yunpeng Wang Luchao Du |
| author_facet | Ying Lv Menghan Duan Jie An Yunpeng Wang Luchao Du |
| author_sort | Ying Lv |
| collection | DOAJ |
| description | Lead halide perovskite quantum dots, also known as perovskite nanocrystals, are considered one of the most promising photovoltaic materials for solar cells due to their outstanding optoelectronic properties and simple preparation techniques. The key factors restricting the photoelectric conversion efficiency of solar cell systems are the separation and transmission performances of charge carriers. Here, femtosecond time-resolved ultrafast spectroscopy was used to measure the interfacial charge transfer dynamics of different sizes of CsPbBr<sub>3</sub> assembled with TiO<sub>2</sub>. The effect of perovskite size on the charge transfer is discussed. According to our experimental data analysis, the time constants of the interfacial electron transfer and charge recombination of the assembled systems of CsPbBr<sub>3</sub> and titanium dioxide become larger when the size of the CsPbBr<sub>3</sub> nanocrystals increases. We discuss the physical mechanism by which the size of perovskites affects the rate of charge transfer in detail. We expect that our experimental results provide experimental support for the application of novel quantum dots for solar cell materials. |
| format | Article |
| id | doaj-art-90e45a8fbafb4bb2b61d88dc89584178 |
| institution | DOAJ |
| issn | 2079-4991 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj-art-90e45a8fbafb4bb2b61d88dc895841782025-08-20T02:47:17ZengMDPI AGNanomaterials2079-49912025-07-011514106510.3390/nano15141065Ultrafast Study of Interfacial Charge Transfer Mechanism in Assembled Systems of CsPbBr<sub>3</sub> and Titanium Dioxide: Size Effect of CsPbBr<sub>3</sub>Ying Lv0Menghan Duan1Jie An2Yunpeng Wang3Luchao Du4Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, ChinaInstitute of Atomic and Molecular Physics, Jilin University, Changchun 130012, ChinaInstitute of Atomic and Molecular Physics, Jilin University, Changchun 130012, ChinaState Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaInstitute of Atomic and Molecular Physics, Jilin University, Changchun 130012, ChinaLead halide perovskite quantum dots, also known as perovskite nanocrystals, are considered one of the most promising photovoltaic materials for solar cells due to their outstanding optoelectronic properties and simple preparation techniques. The key factors restricting the photoelectric conversion efficiency of solar cell systems are the separation and transmission performances of charge carriers. Here, femtosecond time-resolved ultrafast spectroscopy was used to measure the interfacial charge transfer dynamics of different sizes of CsPbBr<sub>3</sub> assembled with TiO<sub>2</sub>. The effect of perovskite size on the charge transfer is discussed. According to our experimental data analysis, the time constants of the interfacial electron transfer and charge recombination of the assembled systems of CsPbBr<sub>3</sub> and titanium dioxide become larger when the size of the CsPbBr<sub>3</sub> nanocrystals increases. We discuss the physical mechanism by which the size of perovskites affects the rate of charge transfer in detail. We expect that our experimental results provide experimental support for the application of novel quantum dots for solar cell materials.https://www.mdpi.com/2079-4991/15/14/1065perovskiteCsPbBr<sub>3</sub>transient absorptionultrafast dynamicssize effectinterfacial carrier transfer |
| spellingShingle | Ying Lv Menghan Duan Jie An Yunpeng Wang Luchao Du Ultrafast Study of Interfacial Charge Transfer Mechanism in Assembled Systems of CsPbBr<sub>3</sub> and Titanium Dioxide: Size Effect of CsPbBr<sub>3</sub> Nanomaterials perovskite CsPbBr<sub>3</sub> transient absorption ultrafast dynamics size effect interfacial carrier transfer |
| title | Ultrafast Study of Interfacial Charge Transfer Mechanism in Assembled Systems of CsPbBr<sub>3</sub> and Titanium Dioxide: Size Effect of CsPbBr<sub>3</sub> |
| title_full | Ultrafast Study of Interfacial Charge Transfer Mechanism in Assembled Systems of CsPbBr<sub>3</sub> and Titanium Dioxide: Size Effect of CsPbBr<sub>3</sub> |
| title_fullStr | Ultrafast Study of Interfacial Charge Transfer Mechanism in Assembled Systems of CsPbBr<sub>3</sub> and Titanium Dioxide: Size Effect of CsPbBr<sub>3</sub> |
| title_full_unstemmed | Ultrafast Study of Interfacial Charge Transfer Mechanism in Assembled Systems of CsPbBr<sub>3</sub> and Titanium Dioxide: Size Effect of CsPbBr<sub>3</sub> |
| title_short | Ultrafast Study of Interfacial Charge Transfer Mechanism in Assembled Systems of CsPbBr<sub>3</sub> and Titanium Dioxide: Size Effect of CsPbBr<sub>3</sub> |
| title_sort | ultrafast study of interfacial charge transfer mechanism in assembled systems of cspbbr sub 3 sub and titanium dioxide size effect of cspbbr sub 3 sub |
| topic | perovskite CsPbBr<sub>3</sub> transient absorption ultrafast dynamics size effect interfacial carrier transfer |
| url | https://www.mdpi.com/2079-4991/15/14/1065 |
| work_keys_str_mv | AT yinglv ultrafaststudyofinterfacialchargetransfermechanisminassembledsystemsofcspbbrsub3subandtitaniumdioxidesizeeffectofcspbbrsub3sub AT menghanduan ultrafaststudyofinterfacialchargetransfermechanisminassembledsystemsofcspbbrsub3subandtitaniumdioxidesizeeffectofcspbbrsub3sub AT jiean ultrafaststudyofinterfacialchargetransfermechanisminassembledsystemsofcspbbrsub3subandtitaniumdioxidesizeeffectofcspbbrsub3sub AT yunpengwang ultrafaststudyofinterfacialchargetransfermechanisminassembledsystemsofcspbbrsub3subandtitaniumdioxidesizeeffectofcspbbrsub3sub AT luchaodu ultrafaststudyofinterfacialchargetransfermechanisminassembledsystemsofcspbbrsub3subandtitaniumdioxidesizeeffectofcspbbrsub3sub |