Deep Absorbing Porphyrin Small Molecule for High-Performance Organic Solar Cells with Very Low Energy Losses | Zendy

Ke Gao | Zendy; Lisheng Li | Zendy; Tianqi Lai | Zendy; Liangang Xiao | Zendy; Yuan Huang | Zendy; Fei Huang | Zendy; Junbiao Peng | Zendy; Yong Cao | Zendy; Feng Liu | Zendy; Thomas P. Russell | Zendy; René A. J. Janssen | Zendy; Xiaobin Peng | Zendy

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Deep Absorbing Porphyrin Small Molecule for High-Performance Organic Solar Cells with Very Low Energy Losses

Author(s) -

Ke Gao,

Lisheng Li,

Tianqi Lai,

Liangang Xiao,

Yuan Huang,

Fei Huang,

Junbiao Peng,

Yong Cao,

Feng Liu,

Thomas P. Russell,

René A. J. Janssen,

Xiaobin Peng

Publication year - 2015

Publication title -

journal of the american chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 7.115

H-Index - 612

eISSN - 1520-5126

pISSN - 0002-7863

DOI - 10.1021/jacs.5b03740

Subject(s) - chemistry , organic solar cell , polymer solar cell , porphyrin , energy conversion efficiency , band gap , open circuit voltage , short circuit , hybrid solar cell , optoelectronics , solar cell , quantum efficiency , absorption (acoustics) , solar cell efficiency , photochemistry , optics , materials science , voltage , organic chemistry , physics , quantum mechanics , polymer

We designed and synthesized the DPPEZnP-TEH molecule, with a porphyrin ring linked to two diketopyrrolopyrrole units by ethynylene bridges. The resulting material exhibits a very low energy band gap of 1.37 eV and a broad light absorption to 907 nm. An open-circuit voltage of 0.78 V was obtained in bulk heterojunction (BHJ) organic solar cells, showing a low energy loss of only 0.59 eV, which is the first report that small molecule solar cells show energy losses <0.6 eV. The optimized solar cells show remarkable external quantum efficiency, short circuit current, and power conversion efficiency up to 65%, 16.76 mA/cm(2), and 8.08%, respectively, which are the best values for BHJ solar cells with very low energy losses. Additionally, the morphology of DPPEZnP-TEH neat and blend films with PC61BM was studied thoroughly by grazing incidence X-ray diffraction, resonant soft X-ray scattering, and transmission electron microscopy under different fabrication conditions.

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