Academic Journal
In Situ Room-Temperature Synthesis of All-Colloidal Quantum Dot CsPbBr 3 –PbS Heterostructures
| العنوان: | In Situ Room-Temperature Synthesis of All-Colloidal Quantum Dot CsPbBr 3 –PbS Heterostructures |
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| المؤلفون: | Yongge Yang, Dandan Wang, Yusheng Li, Jing Xia, Huiyun Wei, Chao Ding, Yuyu Hu, Yuyao Wei, Hua Li, Dong Liu, Guozheng Shi, Yaohong Zhang, Huan Bi, Shikai Chen, Hongshi Li, Xiang-Min Meng, Shuzi Hayase, Qing Shen |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | Biophysics, Biochemistry, Medicine, Biotechnology, Developmental Biology, Cancer, Plant Biology, Virology, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, ∼ 1 ps, yielding spectrally tunable, individual quantum dots, high surface reactivity, harnessing ultraviolet light, garnered significant attention, effective carrier transfer, colloidal quantum dot, 365 nm ), wave infrared imaging, infrared spectral responses, low response threshold, 3 , 2 , heterostructures featuring processability, temperature synthesis approach, standalone pbs qds, temperature synthesis, infrared spectra, infrared emission |
| الوصف: | In optoelectronics, all-colloidal quantum dot (all-CQD) heterostructures featuring processability and extending the functionalities of individual quantum dots (QDs) have garnered significant attention. Particularly, perovskite and chalcogenide QD heterostructures present a compelling platform for integrating visible- and near-infrared spectral responses through effective carrier transfer. However, a lack of controllable and low-cost synthesis methodologies currently curtails the development and application of such intricate structures. Herein, we report a facile and replicable in situ room-temperature synthesis approach for yielding spectrally tunable, low-cost processing all-CQD CsPbBr 3 –PbS heterostructures. This approach utilizes the controllable growth and high surface reactivity of amine-free CsPbBr 3 QDs, together with a highly reactive sulfur source, to facilitate the in situ formation of heterostructures at room temperature. Our fabricated all-CQD CsPbBr 3 –PbS heterostructures possess excellent processability and showcase sustainable dual emission in both visible and infrared spectra. The control over which is finely tuned through the manipulation of the Pb/S ratio. Transient absorption spectroscopy reveals ultrafast interdot carrier injection (initiating in less than ∼1 ps) from the perovskite to PbS within the heterostructures, allowing the photons absorbed by CsPbBr 3 QDs to be efficiently provided for PbS’s infrared emission. Based on their low-cost processability, we debuted their application in short-wave infrared imaging by harnessing ultraviolet light. We attained a resolution with a low response threshold of 18 mW/cm 2 (365 nm), which approaches the International Electrotechnical Commission’s safety limit (10 mW/cm 2 ), significantly surpassing the performance of standalone PbS QDs. Our research presents a reproducible technique for creating controllable and low-cost processing all-CQD heterostructures, which sets the stage for future developments in their application. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| Relation: | https://figshare.com/articles/journal_contribution/In_Situ_Room-Temperature_Synthesis_of_All-Colloidal_Quantum_Dot_CsPbBr_sub_3_sub_PbS_Heterostructures/24596055 |
| DOI: | 10.1021/acsphotonics.3c01099.s001 |
| الاتاحة: | https://doi.org/10.1021/acsphotonics.3c01099.s001 https://figshare.com/articles/journal_contribution/In_Situ_Room-Temperature_Synthesis_of_All-Colloidal_Quantum_Dot_CsPbBr_sub_3_sub_PbS_Heterostructures/24596055 |
| Rights: | CC BY-NC 4.0 |
| رقم الانضمام: | edsbas.9212920 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1021/acsphotonics.3c01099.s001 |
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