Journal ArticleDOI
Small molecule semiconductors for high-efficiency organic photovoltaics
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TLDR
This review summarizes the developments in small molecular donors, acceptors, and donor-acceptor dyad systems for high-performance multilayer, bulk heterojunction, and single-component OPVs and focuses on correlations of molecular chemical structures with properties, such as absorption, energy levels, charge mobilities, and photovoltaic performances.Abstract:
Organic photovoltaic cells (OPVs) are a promising cost-effective alternative to silicon-based solar cells, and possess light-weight, low-cost, and flexibility advantages. Significant progress has been achieved in the development of novel photovoltaic materials and device structures in the last decade. Nowadays small molecular semiconductors for OPVs have attracted considerable attention, due to their advantages over their polymer counterparts, including well-defined molecular structure, definite molecular weight, and high purity without batch to batch variations. The highest power conversion efficiencies of OPVs based on small molecular donor/fullerene acceptors or polymeric donor/fullerene acceptors are up to 6.7% and 8.3%, respectively, and meanwhile nonfullerene acceptors have also exhibited some promising results. In this review we summarize the developments in small molecular donors, acceptors (fullerene derivatives and nonfullerene molecules), and donor–acceptor dyad systems for high-performance multilayer, bulk heterojunction, and single-component OPVs. We focus on correlations of molecular chemical structures with properties, such as absorption, energy levels, charge mobilities, and photovoltaic performances. This structure–property relationship analysis may guide rational structural design and evaluation of photovoltaic materials (253 references).read more
Citations
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Journal ArticleDOI
Realizing Small Energy Loss of 0.55 eV, High Open-Circuit Voltage >1 V and High Efficiency >10% in Fullerene-Free Polymer Solar Cells via Energy Driver
Pei Cheng,Mingyu Zhang,Tsz-Ki Lau,Yao Wu,Boyu Jia,Jiayu Wang,Cenqi Yan,Meng Qin,Xinhui Lu,Xiaowei Zhan +9 more
TL;DR: A new, easy, and efficient approach is reported to enhance the driving force for charge transfer, break tradeoff between open-circuit voltage and shortcircuit current, and simultaneously achieve very small energy loss, very high open-Circuit voltage, and very high efficiency in fullerene-free organic solar cells via an energy driver.
Journal ArticleDOI
Rigidifying Nonplanar Perylene Diimides by Ring Fusion Toward Geometry-Tunable Acceptors for High-Performance Fullerene-Free Solar Cells.
Hongliang Zhong,Chen Hao Wu,Chang-Zhi Li,Joshua H. Carpenter,Chu-Chen Chueh,Jung-Yao Chen,Harald Ade,Alex K.-Y. Jen +7 more
TL;DR: Rigid fused perylene diimide (PDI) dimers bridged with heterocycles exhibit superior photovoltaic performance compared to their unfused semiflexible analogues.
Journal ArticleDOI
Recent Advances in Polymer Solar Cells: Realization of High Device Performance by Incorporating Water/Alcohol‐Soluble Conjugated Polymers as Electrode Buffer Layer
Zhicai He,Hongbin Wu,Yong Cao +2 more
TL;DR: It is anticipated that due to drastic improvements in efficiency and easy utilization, this method opens up new opportunities for PSCs from various material systems to improve towards 10% efficiency, and many novel device structures will emerge as suitable architectures for developing the ideal roll-to-roll type processing of polymer-based solar cells.
Journal ArticleDOI
Binary additives synergistically boost the efficiency of all-polymer solar cells up to 3.45%
TL;DR: In this article, a combination of DIO and PDI-2DTT leads to suitable phase separation and improved and balanced charge transport, which is beneficial to efficiency enhancement, while the additive DIO facilitates aggregation and crystallization of the donor PBDTTT-C-T as well as improves phase separation.
Journal ArticleDOI
Beyond perylene diimides: synthesis, assembly and function of higher rylene chromophores
Long Chen,Chen Li,Klaus Müllen +2 more
TL;DR: In this article, the authors summarized the latest advances in the field of rylene diimide dyes focusing on synthetic strategies toward their preparation and discussed the self-assembly behavior and applications of larger rylene chromophores.
References
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Journal ArticleDOI
C 60 : Buckminsterfullerene
Harold W. Kroto,Harold W. Kroto,James R. Heath,Sean C. O'Brien,Robert F. Curl,Richard E. Smalley +5 more
TL;DR: In this article, the authors proposed a truncated icosahedron, a polygon with 60 vertices and 32 faces, 12 of which are pentagonal and 20 hexagonal.
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Polymer photovoltaic cells : enhanced efficiencies via a network of internal donor-acceptor heterojunctions
TL;DR: In this paper, the carrier collection efficiency and energy conversion efficiency of polymer photovoltaic cells were improved by blending of the semiconducting polymer with C60 or its functionalized derivatives.
Journal ArticleDOI
Conjugated polymer-based organic solar cells
TL;DR: This review gives a general introduction to the materials, production techniques, working principles, critical parameters, and stability of the organic solar cells, and discusses the alternative approaches such as polymer/polymer solar cells and organic/inorganic hybrid solar cells.
Journal ArticleDOI
Two‐layer organic photovoltaic cell
TL;DR: In this paper, a two-layer organic photovoltaic cell was fabricated from copper phthalocyanine and a perylene tetracarboxylic derivative, achieving a power conversion efficiency of about 1% under simulated AM2 illumination.
Journal ArticleDOI
Photoinduced electron transfer from a conducting polymer to buckminsterfullerene.
TL;DR: Because the photoluminescence in the conducting polymer is quenched by interaction with C60, the data imply that charge transfer from the excited state occurs on a picosecond time scale.