Intramolecular Singlet Fission in Oligoacene Heterodimers
作者:Samuel N. Sanders、Elango Kumarasamy、Andrew B. Pun、Michael L. Steigerwald、Matthew Y. Sfeir、Luis M. Campos
DOI:10.1002/anie.201510632
日期:2016.3.1
We investigate singletfission (SF) in heterodimers comprising a pentacene unit covalently bonded to another acene as we systematically vary the singlet and triplet pair energies. We find that these energies control the SF process, where dimers undergo SF provided that the resulting triplet pair energy is similar or lower in energy than the singlet state. In these systems the singlet energy is determined
[EN] QUANTITATIVE INTRAMOLECULAR FISSION IN OLIGOACENES, MATERIALS, AND METHODS OF USE THEREOF<br/>[FR] FRAGMENTATION INTRAMOLÉCULAIRE QUANTITATIVE DANS DES OLIGOACÈNES, MATÉRIAUX, ET LEURS PROCÉDÉS D'UTILISATION
申请人:UNIV COLUMBIA
公开号:WO2016100754A1
公开(公告)日:2016-06-23
The present invention provides soluble, stable singlet fission (SF) compounds, compositions, materials, methods of their use, and methods for their preparation that provide efficient intramolecular singlet fission (iSF) and multiple excitons. The SF compound may be a dimer, an oligomer, or a polymer of polyoligoacenes, where for example, the compound achieves a triplet yield reaching about 200% per absorbed photon. In this system, SF does not depend on intermolecular inter-actions. Instead, SF is an intrinsic property of the molecule and therefore occurs independent of intermolecular interactions. Singlet fission has the potential to significantly improve the photocurrent in single junction solar cells and thus raise the Shockley-Queisser power conversion efficiency limit from about 33% to about 46% or greater. Quantitative SF yield at room temperature has only been observed in crystalline solids or aggregates of higher acenes.
Organic semiconductors with high mobility and high thermal stability are of great importance for practical application of organic electronics. To explore new semiconductors by taking advantage of the intrinsic properties of tetracene molecule, herein, we report the design and synthesis of a novel p-type tetracene derivatives, 2-(anthracen-2-yl)tetracene (TetAnt). Top contact organic thin-film transistors
具有高迁移率和高热稳定性的有机半导体对于有机电子的实际应用非常重要。为了利用并四苯分子的固有特性探索新的半导体,我们在此报告了新型p型并四苯衍生物2-(蒽-2-基)并四苯(TetAnt)的设计和合成。基于TetAnt的顶部接触有机薄膜晶体管(OTFT)显示出最高0.79 cm 2 V -1 s -1的空穴迁移率。另外,即使在热应力至290℃的高温后也保持〜0.4cm 2 V -1 s -1的高迁移率,表明TetAnt的优异的热稳定性。
A Free‐Radical Prompted Barrierless Gas‐Phase Synthesis of Pentacene
作者:Long Zhao、Ralf I. Kaiser、Wenchao Lu、Musahid Ahmed、Mikhail M. Evseev、Eugene K. Bashkirov、Valeriy N. Azyazov、Christina Tönshoff、Florian Reicherter、Holger F. Bettinger、Alexander M. Mebel
DOI:10.1002/anie.202003402
日期:2020.7.6
facilitated by a barrierless, vinylacetylene mediated gas‐phase process thus disputing conventional hypotheses that synthesis of polycyclicaromatichydrocarbons (PAHs) solely proceeds at elevated temperatures. This low‐temperature pathway can launch isomer‐selective routes to aromatic structures through submerged reaction barriers, resonantly stabilized free‐radical intermediates, and methodical ring annulation
通过探索基元反应,揭示了通过环化合成多并苯的代表性低温气相反应机理,以并五苯 (C 22 H 14 ) 及其苯并[ a ]并四苯异构体 (C 22 H 14 ) 的形成为例。 2-十四烯基(C 18 H 11 . )与乙烯基乙炔(C 4 H 4 )的合成。并五苯(多并苯的原型,也是石墨烯、富勒烯和碳纳米管的基本分子构件)的途径是通过无屏障、乙烯基乙炔介导的气相过程促进的,因此对多环芳烃(PAH)的合成单独进行的传统假设提出了质疑在高温下。这种低温途径可以通过水下反应势垒、共振稳定的自由基中间体和深空有条不紊的成环,启动通往芳香族结构的异构体选择性途径,最终改变我们对宇宙中碳化学的看法。
Multiexcitonic Triplet Pair Generation in Oligoacene Dendrimers as Amorphous Solid‐State Miniatures
作者:Juno Kim、Hao Ting Teo、Yongseok Hong、Juwon Oh、Hyungjun Kim、Chunyan Chi、Dongho Kim
DOI:10.1002/anie.202008533
日期:2020.11.16
fission in organic semiconducting materials has attracted great attention for the potential application in photovoltaic devices. Research interests have been concentrated on identifying working mechanisms of coherent SF processes in crystalline solids as ultrafast SF is hailed for efficient multiexciton generation. However, as long lifetime of multiexcitonic triplet pair in amorphoussolids facilitates