Hybrid photovoltaic cells with II-VI quantum dot sensitizers fabricated by layer-by-layer deposition of water-soluble components

作者：Kniprath Rolf; Rabe Juergen P; McLeskey James T Jr; Wang Dayang; Kirstein Stefan^*

来源：Thin Solid Films, 2009, 518(1): 295-298.

DOI：10.1016/j.tsf.2009.06.039

• Nanocrystalline
• CdTe
• CdSe
• Organic
• Polymer
• TiO(2)

We present the fabrication of all solid state heterojunction photovoltaic devices consisting of TiO(2) films sensitized by colloidal CdSe and CdTe quantum dots (QDs) and a hole transport layer of the conjugated polymer poly(9,9-dioctyl-fluorene-co-N-(4-butylenphenyl)diphenylamine). The sensitized films were prepared by alternating the layer-by-layer deposition of TiO(2) nanoparticles, water-soluble semiconductor QDs and polycations. Photovoltaic devices sandwiched between fluorinated tin oxide and gold electrodes showed a high rectification ratio and photovoltages of up to 1.15 V. Effective sensitization was observed for CdSe QDs, while incorporated CdTe QDs apparently had no such effect. These findings are explained by confinement effects in QDs.

• 出版日期2009-11-2
• 单位复旦大学