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

Mayukh, Mayank; Macech, Mariola R.; Placencia, Diogenes; Cao, Yu; Armstrong, Neal R.; McGrath, Dominic V.

doi:10.1021/acsami.5b05900

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

Journal Article · Fri Oct 09 00:00:00 UTC 2015 · ACS Applied Materials and Interfaces

DOI: https://doi.org/10.1021/acsami.5b05900 · OSTI ID:1369938

Mayukh, Mayank ^[1]; Macech, Mariola R. ^[1]; Placencia, Diogenes ^[1]; Cao, Yu ^[1]; Armstrong, Neal R. ^[1]; McGrath, Dominic V. ^[1]

Univ. of Arizona, Tucson, AZ (United States)

Here, 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 (Q_B 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 showed a contribution from 1 exceeding that of acceptor PCBM, and extending to 1000 nm.

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Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Center for Interface Science: Solar Electric Materials (CISSEM)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0001084

OSTI ID:: 1369938

Journal Information:: ACS Applied Materials and Interfaces, Journal Name: ACS Applied Materials and Interfaces Journal Issue: 43 Vol. 7; ISSN 1944-8244

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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