High-efficiency small-molecule ternary solar cells with a hierarchical morphology enabled by synergizing fullerene and non-fullerene acceptors

Zhou, Zichun (författare): Chinese Acad Sci, Peoples R China; Univ Chinese Acad Sci, Peoples R China

Jin, Yingzhi (författare): Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten

Yue, Qihui (författare): Chinese Acad Sci, Peoples R China; Univ Chinese Acad Sci, Peoples R China

Zhang, Fengling (författare): Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten

Zhu, Xiaozhang (författare): Chinese Acad Sci, Peoples R China; Univ Chinese Acad Sci, Peoples R China

(creator_code:org_t)

2018-09-10
2018
Engelska.
Ingår i: NATURE ENERGY. - : NATURE PUBLISHING GROUP. - 2058-7546. ; 3:11, s. 952-959

Relaterad länk:: https://urn.kb.se/re...; visa fler...; https://doi.org/10.1...; visa färre...

Abstract Ämnesord

Stäng

Using combinatory photoactive blends is a promising approach to achieve high power conversion efficiency in ternary organic photovoltaics. However, the fundamental challenge of how to manipulate the morphology of multiple components and correlate structure details via device performance has not been well addressed. Achieving an ideal morphology that simultaneously enhances charge generation and transport and reduces voltage loss is an imperative avenue to improve device efficiency. Here, we achieve a high power conversion efficiency of 13.20 +/- 0.25% for ternary solar cells by using a combination of small molecules with both fullerene and non-fullerene acceptors, which form a hierarchical morphology consisting of a PCBM transporting highway and an intricate non-fullerene phase-separated pathway network. Carrier generation and transport find an optimized balance, and voltage loss is simultaneously reduced. Such a morphology fully utilizes the individual advantages of both fullerene and non-fullerene acceptors, demonstrating their indispensability in organic photovoltaics.

Av författaren/redakt...: Zhou, Zichun; Xu, Shengjie; Song, Jingnan; Jin, Yingzhi; Yue, Qihui; Qian, Yuhao; visa fler...; Liu, Feng; Zhang, Fengling; Zhu, Xiaozhang; visa färre...

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