Journal article

Publication year: 2018

Journal: AIP Advances

Volume number: 8

Issue number: 5

eISSN: 2158-3226

Open access status: Gold

DOI Link: https://doi.org/10.1063/1.5025777

Publisher: American Institute of Physics

Abstract: 
We studied the electron transfer at the interface of organic-inorganic hybrids consisting of indoline derivatives (D149 and D131) on ZnO substrates using a new optical method. We revealed the electron transfer times from the excited dye, e.g. the excitons formed in the dye aggregates to the ZnO substrate by analyzing the photoluminescence transients of the excitons after femtosecond excitation and applying kinetic model calculations. We reveal the changes of the electron transfer times by applying electrical bias. Pushing the Fermi energy of the ZnO substrate towards the excited dye level the transfer time gets longer and eventually the electron transfer is suppressed. The level alignment between the excited dye state and the ZnO Fermi-level is estimated. The excited state of D131 is about 100 meV higher than the respective state of D149 compared to the ZnO conduction band. This leads to shorter electron transfer times and eventually to higher quantum efficiencies of the solar cells. (C) 2018 Author(s).

Harvard Citation style: Meyenburg, I., Hofeditz, N., Ruess, R., Rudolph, M., Schlettwein, D. and Heimbrodt, W. (2018) Optical determination of charge transfer times from indoline dyes to ZnO in solid state dye-sensitized solar cells, AIP Advances, 8(5), Article 055218. https://doi.org/10.1063/1.5025777

APA Citation style: Meyenburg, I., Hofeditz, N., Ruess, R., Rudolph, M., Schlettwein, D., & Heimbrodt, W. (2018). Optical determination of charge transfer times from indoline dyes to ZnO in solid state dye-sensitized solar cells. AIP Advances. 8(5), Article 055218. https://doi.org/10.1063/1.5025777