Unifying Charge Generation, Recombination, and Extraction in Low-Offset Non-Fullerene Acceptor Organic Solar Cells

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28140%2F20%3A63524996" target="_blank" >RIV/70883521:28140/20:63524996 - isvavai.cz</a>

Result on the web

<a href="https://onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1002%2Faenm.202001203&file=aenm202001203-sup-0001-SuppMat.pdf" target="_blank" >https://onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1002%2Faenm.202001203&file=aenm202001203-sup-0001-SuppMat.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/aenm.202001203" target="_blank" >10.1002/aenm.202001203</a>

Result language

angličtina

Original language name

Unifying Charge Generation, Recombination, and Extraction in Low-Offset Non-Fullerene Acceptor Organic Solar Cells

Original language description

Even though significant breakthroughs with over 18% power conversion efficiencies (PCEs) in polymer:non-fullerene acceptor (NFA) bulk heterojunction organic solar cells (OSCs) have been achieved, not many studies have focused on acquiring a comprehensive understanding of the underlying mechanisms governing these systems. This is because it can be challenging to delineate device photophysics in polymer:NFA blends comprehensively, and even more complicated to trace the origins of the differences in device photophysics to the subtle differences in energetics and morphology. Here, a systematic study of a series of polymer:NFA blends is conducted to unify and correlate the cumulative effects of i) voltage losses, ii) charge generation efficiencies, iii) non-geminate recombination and extraction dynamics, and iv) nuanced morphological differences with device performances. Most importantly, a deconvolution of the major loss processes in polymer:NFA blends and their connections to the complex BHJ morphology and energetics are established. An extension to advanced morphological techniques, such as solid-state NMR (for atomic level insights on the local ordering and donor:acceptor ππ interactions) and resonant soft X-ray scattering (for donor and acceptor interfacial area and domain spacings), provide detailed insights on how efficient charge generation, transport, and extraction processes can outweigh increased voltage losses to yield high PCEs.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

ADVANCED ENERGY MATERIALS

ISSN

1614-6832

e-ISSN

—

Volume of the periodical

10

Issue of the periodical within the volume

29

Country of publishing house

DE - GERMANY

Number of pages

15

Pages from-to

"2001203 (1 of 15)"

UT code for WoS article

000540877000001

EID of the result in the Scopus database

2-s2.0-85087158288