Advances in colloidal quantum dot solar cells: The depleted-heterojunction device

作者：Kramer Illan J; Pattantyus Abraham Andras G; Barkhouse Aaron R; Wang Xihua; Konstantatos Gerasimos; Debnath Ratan; Levina Larissa; Raabe Ines; Nazeeruddin Md K; Graetzel Michael; Sargent Edward H^*

来源：Thin Solid Films, 2011, 519(21): 7351-7355.

DOI：10.1016/j.tsf.2010.12.121

• Quantum dot
• Solar cell
• PbS
• Titanium dioxide
• Depleted heterojunction
• Exciton dissociation
• Electron transfer

Colloidal quantum dot (CQD) photovoltaics combine low-cost solution processibility with quantum size-effect tunability to match absorption with the solar spectrum. Recent advances in CQD photovoltaics have led to 3.6% AM1.5 solar power conversion efficiencies. Here we report CQD photovoltaic devices on transparent conductive oxides and show that our devices rely on the establishment of a depletion region for field-driven charge transport and separation. The resultant depleted-heterojunction solar cells provide a 5.1% AM1.5 power conversion efficiency. The devices employ infrared-bandgap size-effect-tuned PbS colloidal quantum dots, enabling broadband harvesting of the solar spectrum.

• 出版日期2011-8-31