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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/17076

Title: An easy-to-fabricate low-temperature TiO2 electron collection layer for high efficiency planar heterojunction perovskite solar cells
Authors: CONINGS, Bert
DERA, Rafael
BOYEN, Hans-Gerhard
Issue Date: 2014
Citation: APL MATERIALS, 2, p. 081505-1-081505-8
Abstract: Organometal trihalide perovskite solar cells arguably represent the most auspicious new photovoltaic technology so far, as they possess an astonishing combination of properties. The impressive and brisk advances achieved so far bring forth highly efficient and solution processable solar cells, holding great promise to grow into a mature technology that is ready to be embedded on a large scale. However, the vast majority of state-of-the-art perovskite solar cells contains a dense TiO2 elec- tron collection layer that requires a high temperature treatment (>450◦C), which obstructs the road towards roll-to-roll processing on flexible foils that can with- stand no more than ∼150◦C. Furthermore, this high temperature treatment leads to an overall increased energy payback time and cumulative energy demand for this emerging photovoltaic technology. Here we present the implementation of an alternative TiO2 layer formed from an easily prepared nanoparticle dispersion, with annealing needs well within reach of roll-to-roll processing, making this technology also appealing from the energy payback aspect. Chemical and mor- phological analysis allows to understand and optimize the processing conditions of the TiO2 layer, finally resulting in a maximum obtained efficiency of 13.6% for a planar heterojunction solar cell within an ITO/TiO2/CH3NH3PbI3-xClxpoly(3- hexylthiophene)/Ag architecture.
Notes: Conings, B (reprint author), Univ Hasselt, Inst Materiaalonderzoek, Wetenschapspk 1, B-3590 Diepenbeek, Belgium.
URI: http://hdl.handle.net/1942/17076
DOI: 10.1063/1.4890245
ISI #: 000342567700007
ISSN: 2166-532X
Category: A1
Type: Journal Contribution
Validation: ecoom, 2015
Appears in Collections: Research publications

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