Charge Transfer Dynamics from Organometal Halide Perovskite to Polymeric Hole Transport Materials in Hybrid Solar Cells

Jan C Brauer; Yong Hui Lee; Mohammad Khaja Nazeeruddin; Natalie Banerji

doi:10.1021/acs.jpclett.5b01698

Charge Transfer Dynamics from Organometal Halide Perovskite to Polymeric Hole Transport Materials in Hybrid Solar Cells

J Phys Chem Lett. 2015 Sep 17;6(18):3675-81. doi: 10.1021/acs.jpclett.5b01698. Epub 2015 Sep 4.

Authors

Jan C Brauer¹, Yong Hui Lee², Mohammad Khaja Nazeeruddin², Natalie Banerji¹

Affiliations

¹ Departement of Chemsitry, University of Fribourg , Chemin du Musée 9, CH-1700 Fribourg, Switzerland.
² Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne , CH-1015 Lausanne, Switzerland.

PMID: 26722741
DOI: 10.1021/acs.jpclett.5b01698

Abstract

Organometal halide perovskites have emerged as promising next-generation solar cell technologies presenting outstanding efficiencies. However, many questions concerning their working principles remain to be answered. Here, we present a detailed study of hole transfer dynamics into polymeric hole transporting materials (HTMs), poly(triarylamine) (PTAA), poly(3-hexylthiophee-2,5-diyl (P3HT), and poly[2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b']dithiophene)-alt-4,7-(2,1,3-benzothiadiazole) (PCPDTBT). The hole transfer dynamics are shown to occur on a time scale of thousands of picoseconds, being orders of magnitude slower compared to hole transfer involving commonly used Spiro-OMeTAD as HTM.

Keywords: halide perovskite; hole transfer dynamics; organometal; solar cells.

Publication types

Research Support, Non-U.S. Gov't