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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An electron acceptor challenging fullerenes for efficient polymer solar cells.
TL;DR: A novel non-fullerene electron acceptor (ITIC) that overcomes some of the shortcomings of fullerene acceptors, for example, weak absorption in the visible spectral region and limited energy-level variability, is designed and synthesized.
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Nonfullerene Acceptor Molecules for Bulk Heterojunction Organic Solar Cells
Guangye Zhang,Jingbo Zhao,Philip C. Y. Chow,Kui Jiang,Jianquan Zhang,Zonglong Zhu,Jie Zhang,Fei Huang,He Yan,He Yan +9 more
TL;DR: Progress is summarized, aiming to describe the molecular design strategy, to provide insight into the structure-property relationship, and to highlight the challenges the field is facing, with emphasis placed on most recent nonfullerene acceptors that demonstrated top-of-the-line photovoltaic performances.
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Bulk Heterojunction Solar Cells: Morphology and Performance Relationships
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Organic light detectors: photodiodes and phototransistors.
TL;DR: This review suggests that organic phototransistors have a large potential to be used in a variety of optoelectronic peculiar applications, such as a photo-sensor, opto-isolator, image sensor, optically controlled phase shifter, and opto -electronic switch and memory.
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25th Anniversary Article: A Decade of Organic/Polymeric Photovoltaic Research
TL;DR: This review article takes a retrospective look at the research and development of OPV, and focuses on recent advances of solution-processed materials and devices during the last decade, particular the polymer version of the materials and Devices.
References
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Journal ArticleDOI
Polythiophene:Perylene Diimide Solar Cells – the Impact of Alkyl‐Substitution on the Photovoltaic Performance
Valentin Kamm,Glauco Battagliarin,Ian A. Howard,Wojciech Pisula,Alexey Mavrinskiy,Chen Li,Klaus Müllen,Frédéric Laquai +7 more
TL;DR: In this article, the photovoltaic properties of blend films of regioregular poly(3-hexylthiophene) (rr-P3HT) and PDI molecules are improved upon using a core-alkylated PDI derivative instead of the often used N-alklyated derivatives.
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Triphenylamine−Oligothiophene Conjugated Systems as Organic Semiconductors for Opto-Electronics
TL;DR: In this paper, a hybrid system consisting of a triphenylamine core carrying π-conjugated terthienyl branches has been synthesized and characterized by differential scanning calorimetry, X-ray diffraction, cyclic voltammetry, UV−vis absorption and fluorescence spectroscopy.
Journal ArticleDOI
High efficiency organic photovoltaics incorporating a new family of soluble fullerene derivatives
TL;DR: In this article, a novel class of soluble fullerenoids based on a dihydronaphthyl functionalization have been synthesized and characterized, which when blended with poly(3-hexylthiophene) is capable of 4.5% power conversion efficiencies under standard illumination conditions.
Journal ArticleDOI
A tailored hybrid BODIPY-oligothiophene donor for molecular bulk heterojunction solar cells with improved performances.
Theodulf Rousseau,Antonio Cravino,Emilie Ripaud,Philippe Leriche,Sandra Rihn,Antoinette De Nicola,Raymond Ziessel,Jean Roncali +7 more
TL;DR: Fixation of a 5-hexyl-2,2'-bithienyl unit on a conjugated BODIPY donor increases the conversion efficiency of the resulting molecular bulk heterojunction solar cells from 1.30 to 2.20%.
Journal ArticleDOI
A Non‐Fullerene Small Molecule as Efficient Electron Acceptor in Organic Bulk Heterojunction Solar Cells
TL;DR: A novel n-type small molecule FFI-1 was synthesized as the electron acceptor to replace PCBM in solution-processed organic BHJ solar cells, making it a promising acceptor candidate.