Enhanced Open-Circuit Voltage in Visible Quantum Dot Photovoltaics by Engineering of Carrier-Collecting Electrodes

Autor:	Xihua Wang, Edward H. Sargent, Larissa Levina, Ratan Debnath, Ghada I. Koleilat, Jiang Tang, Armin Fischer
Rok vydání:	2011
Předmět:	Materials science business.industry Open-circuit voltage Energy conversion efficiency Quantum dot solar cell law.invention Quantum dot Photovoltaics law Solar cell Optoelectronics General Materials Science business Ohmic contact Solar power
Zdroj:	ACS Applied Materials & Interfaces. 3:3792-3795
ISSN:	1944-8252 1944-8244
Popis:	Colloidal quantum dots (CQDs) enable multijunction solar cells using a single material programmed using the quantum size effect. Here we report the systematic engineering of 1.6 eV PbS CQD solar cells, optimal as the front cell responsible for visible-wavelength harvesting in tandem photovoltaics. We rationally optimize each of the device's collecting electrodes-the heterointerface with electron-accepting TiO(2) and the deep-work-function hole-collecting MoO(3) for ohmic contact-for maximum efficiency. We report an open-circuit voltage of 0.70 V, the highest observed in a colloidal quantum dot solar cell operating at room temperature. We report an AM1.5 solar power conversion efficiency of 3.5%, the highest observed in1.5 eV bandgap CQD PV device.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b1a88ec8e6ed28667f81c8f392c27e6 https://doi.org/10.1021/am201097p Zobrazit plný text záznamu