A spiro-bifluorene based 3D electron acceptor with dicyanovinylene substitution for solution-processed non-fullerene organic solar cells
A spiro-bifluorene based 3D electron acceptor with dicyanovinylene substitution for solution-processed non-fullerene organic solar cells
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DOI：
10.1039/c5ta00108k
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发表时间：
2015-05
影响因子：
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通讯作者：
Debin Xia;D. Gehrig;Xin Guo;M. Baumgarten;F. Laquai;K. Müllen
中科院分区：
文献类型：
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作者：
Debin Xia;D. Gehrig;Xin Guo;M. Baumgarten;F. Laquai;K. Müllen
合成了一种具有三维分子结构的新型电子受体2,2′-(12H,12′H-10,10′-spirobi[茚并[2,1-b]芴]-12,12′-二亚基)二丙二腈(4CN-spiro),并具有热学、光物理、电化学、晶体和光伏性能。 性质进行了调查。该新型受体表现出优异的热稳定性，分解温度为460°C，吸收范围延伸至600 nm，LUMO能级为-3.63 eV。使用 4CN-spiro 作为受体和聚噻吩并[3,4-b]-噻吩-苯并二噻吩 (PTB7) 作为供体聚合物制造了溶液处理的本体异质结 (BHJ) 有机太阳能电池。研究了供体与受体的比例和加工条件对器件性能的影响。由四氯乙烷以供体与受体重量比为1:1加工而成的器件产生了0.80%的功率转换效率(PCE)。
A novel electron acceptor, namely 2,2′-(12H,12′H-10,10′-spirobi[indeno[2,1-b]fluorene]-12,12′-diylidene)dimalononitrile (4CN-spiro), exhibiting a three-dimensional molecular structure was synthesized and its thermal, photophysical, electrochemical, crystal, and photovoltaic properties were investigated. The novel acceptor exhibits excellent thermal stability with a decomposition temperature of 460 °C, an absorption extending to 600 nm, and a LUMO level of −3.63 eV. Solution processed bulk-heterojunction (BHJ) organic solar cells were fabricated using 4CN-spiro as an acceptor and polythieno[3,4-b]-thiophene-co-benzodithiophene (PTB7) as a donor polymer. The effect of the donor-to-acceptor ratio and processing conditions on the device performance was investigated. A device processed from tetrachloroethane with a donor to acceptor weight ratio of 1 : 1 yielded a power conversion efficiency (PCE) of 0.80%.