[6,6]-苯基-C-61-丁酸甲酯(PCBM)和聚(3-己基噻吩)(P3HT)分别是聚合物太阳能电池(PSC)中使用最广泛的受体和供体材料。但是,PCBM的低LUMO(最低未占用分子轨道)能级限制了基于P3HT的PSC的开路电压(V oc)。本文报道了一种简单,低成本,有效的修饰PCBM并提高其吸收率的方法,该方法可以扩展到所有具有酯结构的富勒烯衍生物。特别地,将PCBM水解为羧酸,然后转化为相应的羰基氯。后者与4-硝基-4'-羟基-α-氰基二苯乙烯缩合,得到改性的富勒烯F。由于有机部分的增加,它比PCBM在普通有机溶剂中的溶解度更高。在250-900 nm的范围内,溶液和F薄膜均显示出比PCBM更强的吸收能力。F和PCBM的电化学性质和电子能级通过循环伏安法测量。F的LUMO能级比PCBM高0.25 eV。基于F的P3HT的PSC显示出0.86 V的更高V oc和8.5 mA cm -2的短路电流(J
A novel oligothiophene and its fullerene derivative were synthesized and their film morphologies were investigated. AFM images revealed that the oligothiophene formed well-aligned fiber-like nanostructures in the film after being thermally annealed at its liquid-crystalline temperature. In the oligothiopheneâfullerene dyad film, fibers were already formed in the as-cast film. Thermal annealing further enhanced the structural order and a long, partially aligned fibrous nanostructure with a width of around 10 nm and a length of as long as 200 nm was observed. Combined with the results of X-ray analysis, these features were ascribed to supramolecular self-assembly via ÏâÏ interaction of the oligothiophene groups. Photovoltaic properties of the molecules were also investigated.
Triazabicylodecene can effectively n-dope a variety of organic semiconductors, including PCBM, thus increasing in-plane conductivities. We synthesized a series of TBD-based n-dopants via an N-alkylation reaction and studied the effect of various alkyl chains on the physical and device properties of the dopants. Combining two TBD moieties on a long alky chain gave a solid dopant, 2TBD-C10, with high thermal stability above 250° C. PCBM films doped by 2TBD-C10 were the most tolerant to thermal annealing and reached in-plane conductivities of 6.5×10
−2
S/cm. Furthermore, incorporating 2TBD-C10 doped PCBM as the electron transport layer (ETL) in methylammonium lead triiodide (MAPbI
3
) based photovoltaics led to a 23% increase in performance, from 11.8% to 14.5% PCE.
PROCESS OF MANUFACTURING AN ELECTRON TRANSPORT MATERIAL
申请人:PHILLIPS 66 COMPANY
公开号:US20170098772A1
公开(公告)日:2017-04-06
A process of dissolving [6,6]-phenyl-C
60
-butyric-N-2-dimethylaminoethyl ester in a solvent to produce a first mixture. A reagent is added to the first mixture to produce a second mixture. The second mixture is then refluxed to produce [6,6]-phenyl-C
60
-butyric-N-2-trimethylammonium ethyl ester iodide.
synthesis of two dyads involving small arylamine-based push-pull systems as donor block and C60 fullerene as acceptor connected by a flexible insulating linker formed by esterification is described. After analysis of their electronic properties by cyclic voltammetry and UV–Vis absorption spectroscopy, the potential of these molecules as active material for single-material organicsolarcells has been evaluated
A Cross‐Linkable Electron‐Transport Layer Based on a Fullerene−Benzoxazine Derivative for Inverted Polymer Solar Cells
作者:Sandeepa Kulala Vittala、Remya Ravi、Biswapriya Deb、Joshy Joseph
DOI:10.1002/cplu.202000354
日期:2020.7
(C−PCBB). Atomic force microscopy (AFM) and optical microscopic studies showed dramatic reduction in the roughness and aggregation behaviour of P3HT‐PCBM polymer blend film upon incorporation of C−PCBB interlayer. An inverted bulk heterojunction solarcell based on the configuration ITO/ZnO/C−PCBB/P3HT‐PCBM/V2O5/Ag achieved 4.27 % power conversion efficiency (PCE) compared to the reference device ITO/Z