Ternary solar cells with a mixed face-on and edge-on orientation enable an unprecedented efficiency of 12.1%

T. Kumari, S.M. Lee, S.-H. Kang, S. Chen, C. Yang

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Abstrakt

Ternary organic solar cells (OSCs), with a simple structure, can be easily adopted as sub-cells in a tandem design, thereby further enhancing the power conversion efficiency (PCE). Considering the potential to surpass the theoretical PCE limit in OSCs, we incorporated a benzo[1,2-b;4,5-b′]dithiophene-based small molecule into a poly(4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b;4,5-b′]dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno[3,4-b]thiophene-)-2-carboxylate-2-6-diyl):[6,6]-phenyl-C 71-butyric acid methyl ester host system. A hitherto unrealized PCE of 12.1% was achieved at the optimized composition of the ternary blend. The ternary blend surprisingly had a face-on and edge-on co-existent texture, which is far better than that of the face-on orientated host film. To the best of our knowledge, this intriguing result refutes for the first time a general paradigm that high-performance OSCs are unambiguously linked to face-on structures. Therefore, our study provides a new platform for refining the theoretical underpinning of multiple blending OSCs.

OriginalsprogEngelsk
TidsskriftEnergy & Environmental Science
Vol/bind10
Udgave nummer1
Sider (fra-til)258-265
ISSN1754-5692
DOI
StatusUdgivet - 2017
Udgivet eksterntJa

Fingeraftryk

Dyk ned i forskningsemnerne om 'Ternary solar cells with a mixed face-on and edge-on orientation enable an unprecedented efficiency of 12.1%'. Sammen danner de et unikt fingeraftryk.

Citationsformater