The Path to 20% Power Conversion Efficiencies in Nonfullerene Acceptor Organic Solar Cells

被引：197

作者：

Karki, Akchheta ^{[1
]}

Gillett, Alexander J. ^{[2
]}

Friend, Richard H. ^{[2
]}

Thuc-Quyen Nguyen ^{[1
]}

机构：

[1] Univ Calif Santa Barbara UCSB, Ctr Polymers & Organ Solids, Santa Barbara, CA 93106 USA

[2] Univ Cambridge, Optoelect Grp Cavendish Lab, JJ Thomson Ave, Cambridge CB3 0HE, England

来源：

ADVANCED ENERGY MATERIALS | 2021年 / 11卷 / 15期

关键词：

charge generation; charge recombination; morphology; nonfullerene acceptors; solid‐ state NMR; voltage losses; SOLID-STATE NMR; OPEN-CIRCUIT VOLTAGE; NON-GEMINATE RECOMBINATION; NON-FULLERENE ACCEPTORS; CHARGE-TRANSFER STATES; HIGH FILL FACTOR; BIMOLECULAR RECOMBINATION; CARRIER GENERATION; PROCESSING ADDITIVES; ELECTRON-TRANSFER;

D O I：

10.1002/aenm.202003441

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The power conversion efficiencies (PCEs) of single-junction organic solar cells (OSC) have now reached over 18%. This rapid recent progress can be attributed to the development of new nonfullerene electron acceptors (NFAs) that are paired with suitable high performing polymer electron donors. Substantial improvements in the PCEs and long-term stability enabled by NFA OSCs have allowed the development and integration of these systems into many niche and novel applications. Here, the recent progress that has been made in understanding the device photophysics of high performing polymer:NFA blends is highlighted. As the bulk heterojunction morphology is intrinsically linked to the device photophysics, this review focuses on studies that have provided noteworthy morphological insights using advanced techniques such as solid-state NMR and resonant soft X-ray scattering. Through this, some of the major challenges that must be overcome to attain PCEs of over 20% in NFA OSCs are addressed.

引用

页数：30

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