Improvement of Interfacial Contacts for New Small‐Molecule Bulk‐Heterojunction Organic Photovoltaics | Zendy

Garcia Andres | Zendy; Welch Gregory C. | Zendy; Ratcliff Erin L. | Zendy; Ginley David S. | Zendy; Bazan Guillermo C. | Zendy; Olson Dana C. | Zendy

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Improvement of Interfacial Contacts for New Small‐Molecule Bulk‐Heterojunction Organic Photovoltaics

Author(s) -

Garcia Andres,

Welch Gregory C.,

Ratcliff Erin L.,

Ginley David S.,

Bazan Guillermo C.,

Olson Dana C.

Publication year - 2012

Publication title -

advanced materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 10.707

H-Index - 527

eISSN - 1521-4095

pISSN - 0935-9648

DOI - 10.1002/adma.201200963

Subject(s) - materials science , pedot:pss , organic solar cell , energy conversion efficiency , non blocking i/o , molecule , open circuit voltage , protonation , photovoltaics , heterojunction , small molecule , photovoltaic system , pyridine , chemical engineering , nanotechnology , optoelectronics , voltage , layer (electronics) , organic chemistry , polymer , catalysis , ion , ecology , chemistry , physics , quantum mechanics , engineering , composite material , biology , genetics

The influence of protonation reactions between poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and a thiadiazolo[3,4‐c]pyridine small‐molecule donor are reported; these result in poor solar‐cell performance due to a barrier for charge extraction. The use of a NiO x contact eliminates such deleterious chemical interactions and results in substantial improvements in open‐circuit voltage, fill factor, and an increased power conversion efficiency from 2.3% to 5.1%.

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