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
Graphene quantum dots as the hole transport layer material for high-performance organic solar cells.
Miaomiao Li,Wang Ni,Bin Kan,Xiangjian Wan,Long Zhang,Qian Zhang,Guankui Long,Yi Zuo,Yongsheng Chen +8 more
TL;DR: Results indicate that GQDs can be potentially used to replace PEDOT:PSS for producing high-performance and stable organic photovoltaic cells.
Journal ArticleDOI
Effects of Alkyl Terminal Chains on Morphology, Charge Generation, Transport, and Recombination Mechanisms in Solution-Processed Small Molecule Bulk Heterojunction Solar Cells
Jie Min,Yuriy N. Luponosov,Nicola Gasparini,Moses Richter,Artem V. Bakirov,Artem V. Bakirov,Maxim A. Shcherbina,Sergei N. Chvalun,Sergei N. Chvalun,Linda Grodd,Souren Grigorian,Tayebeh Ameri,Sergei A. Ponomarenko,Sergei A. Ponomarenko,Christoph J. Brabec +14 more
TL;DR: In this article, the terminal alkyl chains at dicyanovinyl (DCV) groups of two DTS containing small molecules were investigated to evaluate how this affects the molecular solubility and blend morphology as well as their performance in bulk heterojunction organic solar cells.
Journal ArticleDOI
The Dawn of Single Material Organic Solar Cells
Jean Roncali,Ion Grosu +1 more
TL;DR: Recent advances in the synthesis of D–A materials for SMOSCs are presented in the broader context of the chemistry of organic photovoltaic materials in order to discuss possible directions for future research.
Journal ArticleDOI
Ladder-Type Dithienonaphthalene-Based Small-Molecule Acceptors for Efficient Nonfullerene Organic Solar Cells
TL;DR: In this article, two small molecule acceptors (DTNIC6 and DTNIC8) based on a ladder-type dithienonaphthalene building block with linear or branched 2-ethylhexyl substituents are designed and synthesized.
Journal ArticleDOI
Difluorobenzothiadiazole-Based Small-Molecule Organic Solar Cells with 8.7% Efficiency by Tuning of π-Conjugated Spacers and Solvent Vapor Annealing
Jin-Liang Wang,Fei Xiao,Jun Yan,Zhuo Wu,Kai-Kai Liu,Zheng-Feng Chang,Ru-Bo Zhang,Hui Chen,Hongbin Wu,Yong Cao +9 more
TL;DR: In this article, a series of tetrafluorine-substituted, wide-bandgap, small molecules consisting of various π-conjugated spacers (furan, thiophene, selenophene) between indacenodithiophene as the electrondonating core and the electron-deficient difluorobenzothiadiazole unit is reported and the effect of the πconjugation spacer on the photovoltaic properties is investigated.
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.