Solution Processed Titanyl Phthalocyanines as Donors in Solar Cells: Photoresponse to 1000 nm

Autor:	Diogenes Placencia, Dominic V. McGrath, Mariola R. Macech, Yu Cao, Neal R. Armstrong, Mayank Mayukh
Rok vydání:	2015
Předmět:	Materials science Wavelength range X-ray crystallography Molecule General Materials Science Nanotechnology Chromophore Photochemistry Absorption (electromagnetic radiation) Acceptor Polymer solar cell Solution processed
Zdroj:	ACS Applied Materials & Interfaces. 7:23912-23919
ISSN:	1944-8252 1944-8244
DOI:	10.1021/acsami.5b05900
Popis:	We report a route to thin-film polymorphs of soluble TiOPc derivatives that exhibit similar near-IR absorptivities as vapor deposited thin-films of the parent TiOPc chromophore (phase-I and phase-II polymorphs) and demonstrate that solution-processed planar and bulk heterojunction solar cells fabricated with one of these derivatives exhibited photoactivity throughout the same near-IR wavelength range without compromising VOC. Solution-processed thin-films of soluble octakis(alkylthio)-substituted TiOPc derivatives 1-3 exhibit absorption extending to 1000 nm. When incorporated into OPV devices, the contributions from the lowest CT excitonic state (QB band) of 1 to device performance were evident in both PHJ and BHJ architectures, indicating sufficient driving force for PIET. This contribution was improved via intimate mixing of donor and acceptor molecules in a BHJ architecture, albeit with a decrease in efficiency. IPCE of the best performing BHJ device revealed a contribution from 1 exceeding that of acceptor PCBM, and extending to 1000 nm.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15005449c43b1ccb712a2a554989b6ab https://doi.org/10.1021/acsami.5b05900 Zobrazit plný text záznamu