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Hole transfer dynamics from dye molecules to p-type NiO nanoparticles : effects of processing conditions

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Hole transfer dynamics from dye molecules to p-type NiO nanoparticles : effects of processing conditions
นักวิจัย : Wu, Xiangyang , Xing, Guichuan , Tan, Serena L. J. , Webster, Richard David , Sun, Tze Chien , Yeow, Edwin Kok Lee
คำค้น : -
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2555
อ้างอิง : Wu, X., Xing, G., Tan, S. L. J., Webster, R. D., Sun, T. C., Yeow, E. K. L. (2012). Hole transfer dynamics from dye molecules to p-type NiO nanoparticles : effects of processing conditions. Physical Chemistry Chemical Physics, 14, 9511-9519. , http://hdl.handle.net/10220/11057 , http://dx.doi.org/10.1039/C2CP40926G
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Physical chemistry chemical physics
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Hole transfer dynamics of Atto647N sensitized p-type NiO nanoparticle (NP) thin films is investigated using both ensemble-averaged and single-molecule spectroscopy techniques. The rate of hole transfer is dependent on the processing conditions and is enhanced when the NiO is pre-annealed in air as compared to vacuum. This is possibly due to an upward shift of the valence band of the semiconductor and an increase in the free energy for hole transfer as more Ni2O3 are formed in the presence of air. The stretched exponential fluorescence decay profile of Atto647N on NiO NP suggests the presence of a distribution of hole transfer rates. This is in agreement with the observed emission lifetime and intensity fluctuations and non-monoexponential fluorescence decays for individual Atto647N molecules on NiO NP films. A plausible explanation for the heterogeneous hole transfer rates is an inhomogeneous distribution of (defect) sites on the metal oxide due to the processing conditions and a fluctuation in the intermolecular interaction.

บรรณานุกรม :
Wu, Xiangyang , Xing, Guichuan , Tan, Serena L. J. , Webster, Richard David , Sun, Tze Chien , Yeow, Edwin Kok Lee . (2555). Hole transfer dynamics from dye molecules to p-type NiO nanoparticles : effects of processing conditions.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Wu, Xiangyang , Xing, Guichuan , Tan, Serena L. J. , Webster, Richard David , Sun, Tze Chien , Yeow, Edwin Kok Lee . 2555. "Hole transfer dynamics from dye molecules to p-type NiO nanoparticles : effects of processing conditions".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Wu, Xiangyang , Xing, Guichuan , Tan, Serena L. J. , Webster, Richard David , Sun, Tze Chien , Yeow, Edwin Kok Lee . "Hole transfer dynamics from dye molecules to p-type NiO nanoparticles : effects of processing conditions."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2555. Print.
Wu, Xiangyang , Xing, Guichuan , Tan, Serena L. J. , Webster, Richard David , Sun, Tze Chien , Yeow, Edwin Kok Lee . Hole transfer dynamics from dye molecules to p-type NiO nanoparticles : effects of processing conditions. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2555.