Orbital Topology Controlling Charge Injection in Quantum-Dot-Sensitized Solar Cells
(2014) In The Journal of Physical Chemistry Letters 5(7). p.1157-1162- Abstract
- Quantum-dot-sensitized solar cells are emerging as a promising development of dye-sensitized solar cells, where photostable semiconductor quantum dots replace molecular dyes. Upon photoexcitation of a quantum dot, an electron is transferred to a high-band-gap metal oxide. Swift electron transfer is crucial to ensure a high overall efficiency of the solar cell. Using femtosecond time-resolved spectroscopy, we find the rate of electron transfer to be surprisingly sensitive to the chemical structure of the linker molecules that attach the quantum dots to the metal oxide. A rectangular barrier model is unable to capture the observed variation. Applying bridge-mediated electron-transfer theory, we find that the electron-transfer rates depend on... (More)
- Quantum-dot-sensitized solar cells are emerging as a promising development of dye-sensitized solar cells, where photostable semiconductor quantum dots replace molecular dyes. Upon photoexcitation of a quantum dot, an electron is transferred to a high-band-gap metal oxide. Swift electron transfer is crucial to ensure a high overall efficiency of the solar cell. Using femtosecond time-resolved spectroscopy, we find the rate of electron transfer to be surprisingly sensitive to the chemical structure of the linker molecules that attach the quantum dots to the metal oxide. A rectangular barrier model is unable to capture the observed variation. Applying bridge-mediated electron-transfer theory, we find that the electron-transfer rates depend on the topology of the frontier orbital of the molecular linker. This promises the capability of fine tuning the electron-transfer rates by rational design of the linker molecules. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4439560
- author
- Hansen, Thorsten LU ; Zidek, Karel LU ; Zheng, Kaibo LU ; Qenawy, Mohamed LU ; Chabera, Pavel LU ; Persson, Petter LU and Pullerits, Tönu LU
- organization
- publishing date
- 2014
- type
- Contribution to journal
- publication status
- published
- subject
- in
- The Journal of Physical Chemistry Letters
- volume
- 5
- issue
- 7
- pages
- 1157 - 1162
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000333947700018
- scopus:84898076784
- pmid:26274464
- ISSN
- 1948-7185
- DOI
- 10.1021/jz5001193
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060), Theoretical Chemistry (S) (011001039)
- id
- b0c2eedf-1faf-4df1-9d70-44f4ce0bdbb3 (old id 4439560)
- date added to LUP
- 2016-04-01 13:45:37
- date last changed
- 2023-09-03 04:41:08
@article{b0c2eedf-1faf-4df1-9d70-44f4ce0bdbb3, abstract = {{Quantum-dot-sensitized solar cells are emerging as a promising development of dye-sensitized solar cells, where photostable semiconductor quantum dots replace molecular dyes. Upon photoexcitation of a quantum dot, an electron is transferred to a high-band-gap metal oxide. Swift electron transfer is crucial to ensure a high overall efficiency of the solar cell. Using femtosecond time-resolved spectroscopy, we find the rate of electron transfer to be surprisingly sensitive to the chemical structure of the linker molecules that attach the quantum dots to the metal oxide. A rectangular barrier model is unable to capture the observed variation. Applying bridge-mediated electron-transfer theory, we find that the electron-transfer rates depend on the topology of the frontier orbital of the molecular linker. This promises the capability of fine tuning the electron-transfer rates by rational design of the linker molecules.}}, author = {{Hansen, Thorsten and Zidek, Karel and Zheng, Kaibo and Qenawy, Mohamed and Chabera, Pavel and Persson, Petter and Pullerits, Tönu}}, issn = {{1948-7185}}, language = {{eng}}, number = {{7}}, pages = {{1157--1162}}, publisher = {{The American Chemical Society (ACS)}}, series = {{The Journal of Physical Chemistry Letters}}, title = {{Orbital Topology Controlling Charge Injection in Quantum-Dot-Sensitized Solar Cells}}, url = {{http://dx.doi.org/10.1021/jz5001193}}, doi = {{10.1021/jz5001193}}, volume = {{5}}, year = {{2014}}, }