Journal
ACS MACRO LETTERS
Volume 3, Issue 10, Pages 1009-1014Publisher
AMER CHEMICAL SOC
DOI: 10.1021/mz500415a
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Funding
- National Research Foundation - Korean Government [2012M1A2A2671746, 2013R1A2A1A03069803]
- New & Renewable Energy Program of KETEP - Ministry of Trade, Industry & Energy, Republic of Korea [20133030000130, 20133030011330]
- KAIST EEWS Initiative [EEWSN01140052]
- National Research Foundation of Korea [2013R1A2A1A03069803, 2012M1A2A2671746] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We report highly efficient all-polymer solar cells with power conversion efficiencies of over 4.5% by highly intermixed blends of PTB7-Th donor and P(NDI2OD-T2) acceptor polymers. The low interfacial tension and the face-on pi-pi stockings of the all-polymer blends afforded desired nanophase morphology, which facilitates efficient charge transport from the active layer to each electrode. In addition, the incorporation of 1,8-diiodooctane additives was able to tune the degree of crystallinity and orientation of P(NDI2OD-T2) acceptors, resulting in remarkable enhancement of electron mobility, external quantum efficiency, and J(sc) values.
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