当前位置：
X-MOL 学术
›
J. Phys. Chem. C
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Photodynamics at the CdSe Quantum Dot–Perylene Diimide Interface: Unraveling the Excitation Energy and Electron Transfer Pathways
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2021-02-08 , DOI: 10.1021/acs.jpcc.0c09891 Lars Dworak 1 , Anne Bottin 2 , Sina Roth 1 , Phuong Thao Trinh 1 , Klaus Müllen 2 , Thomas Basché 2 , Josef Wachtveitl 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2021-02-08 , DOI: 10.1021/acs.jpcc.0c09891 Lars Dworak 1 , Anne Bottin 2 , Sina Roth 1 , Phuong Thao Trinh 1 , Klaus Müllen 2 , Thomas Basché 2 , Josef Wachtveitl 1
Affiliation
|
Excitation energy and charge transfer processes in perylene diimide dye–CdSe quantum dot complexes have been studied by femtosecond transient absorption spectroscopy. After excitation of the quantum dots high above the band edge, the electronically excited perylene diimide forms on a timescale similar to the ultrafast quantum dot intraband relaxation. An extraordinarily fast energy transfer time of <300 fs is determined, indicating that the transfer from the hot excitonic state competes with quantum dot intraband relaxation. A much slower kinetic component is attributed to the energy transfer from the quantum dot’s lowest excitonic state to perylene diimide. At high dye–quantum dot ratios, the electronically excited dye generated in the energy transfer reaction is reduced by an electron transfer from the quantum dot ground state. This study demonstrates the potential of the investigated organic–inorganic hybrid for the design of tailor-made energy transfer systems, which can be applied in the emerging field of hot exciton utilization.
中文翻译：
CdSe量子点-Per二酰亚胺界面处的光动力学：揭示激发能和电子转移途径
fe秒瞬态吸收光谱研究了per二酰亚胺染料-CdSe量子点络合物中的激发能和电荷转移过程。在激发高能带边缘的量子点后，以类似于超快量子点带内弛豫的时间尺度形成电子激发的per二酰亚胺。确定了小于300 fs的异常快速的能量转移时间，表明来自热激子态的转移与量子点带内弛豫竞争。动力学成分要慢得多，这是由于从量子点的最低激子态到state二酰亚胺的能量转移。在高的染料-量子点比率下，能量转移反应中产生的电子激发染料会因从量子点基态转移电子而减少。
更新日期：2021-02-18
中文翻译：
CdSe量子点-Per二酰亚胺界面处的光动力学：揭示激发能和电子转移途径
fe秒瞬态吸收光谱研究了per二酰亚胺染料-CdSe量子点络合物中的激发能和电荷转移过程。在激发高能带边缘的量子点后，以类似于超快量子点带内弛豫的时间尺度形成电子激发的per二酰亚胺。确定了小于300 fs的异常快速的能量转移时间，表明来自热激子态的转移与量子点带内弛豫竞争。动力学成分要慢得多，这是由于从量子点的最低激子态到state二酰亚胺的能量转移。在高的染料-量子点比率下，能量转移反应中产生的电子激发染料会因从量子点基态转移电子而减少。
京公网安备 11010802027423号