High efficiency solution-processed two-dimensional small molecule organic solar cells obtained via low-temperature thermal annealing
High efficiency solution-processed two-dimensional small molecule organic solar cells obtained via low-temperature thermal annealing
复制标题
通过低温热退火获得高效溶液加工二维小分子有机太阳能电池
DOI：
10.1039/c4ta03314k
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发表时间：
2014-01-01
影响因子：
11.9
通讯作者：
Yang, Renqiang
中科院分区：
文献类型：
--
作者：
Du, Zhengkun;Chen, Weichao;Yang, Renqiang
设计并合成了一种新的用于溶液处理有机太阳能电池（OSCs）的二维有机小分子DCA3T（T-BDT）。DCA3T（T-BDT）表现出较深的HOMO能级（-5.37 eV）和良好的热稳定性。采用原子力显微镜研究了DCA3T(T-BDT):[6,6]-苯基- c61 -丁酸甲酯（PC61BM）共混物的形貌，并用x射线衍射仪（XRD）和二维掠入射广角x射线散射仪（GIWAXS）研究了共混物的结晶度。共混物的形貌受DCA3T(T-BDT): PC61BM的共混比例和退火温度的影响较大。详细研究了热退火对DCA3T（T-BDT）基小分子有机太阳能电池（SMOSCs）光伏性能的影响。以DCA3T（T-BDT）为供体，PC61BM为受体，在60℃的高温退火条件下，获得了功率转换效率为7.93%、V-oc为0.95 V、J（sc）为11.86 mA cm（-2）、FF为0.70的高效SMOSCs，与溶剂添加或界面改性处理相比，具有明显的规模化生产优势。
A new two-dimensional (2D) organic small molecule, DCA3T(T-BDT), was designed and synthesized for solution-processed organic solar cells (OSCs). DCA3T(T-BDT) exhibited a deep HOMO energy level (-5.37 eV) and good thermal stability. The morphologies of the DCA3T(T-BDT):[6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) blends were investigated by atomic force microscopy and the crystallinity was explored by X-ray diffraction (XRD) and 2D grazing incidence wide-angle X-ray scattering (GIWAXS), respectively. The morphologies of the blends were strongly influenced by the blend ratio of DCA3T(T-BDT): PC61BM and annealing temperature. The effect of thermal annealing on the photovoltaic performance of DCA3T(T-BDT)-based small molecule organic solar cells (SMOSCs) was studied in detail. When DCA3T(T-BDT) was used as a donor with PC61BM as an acceptor, high efficiency SMOSCs with a power conversion efficiency of 7.93%, a high V-oc of 0.95 V, J(sc) of 11.86 mA cm(-2) and FF of 0.70 were obtained by a thermal annealing process at only 60 degrees C, which offers obvious advantages for large scale production compared with solvent additive or interfacial modification treatment.