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RISS 인기검색어
- 검색키워드
- 저자 : De-Yi Chiang (검색결과 2 건)
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Enhanced Performance of Pseudo-Bilayer Organic Photovoltaic Devices via Small Molecule Doping
Syu, Yu-Wei,Huang, Peng-Yi,Li, Husan-De,Hsu, Ching-Ling,Chiu, Kuan-Cheng,Kim, Choongik,Chen, Ming-Chou,Chao, Yu-Chiang American Chemical Society 2014 The Journal of Physical Chemistry Part C Vol.118 No.19
<P>Controlling both the film crystallinity of the active layer for better charge transport and the interdiffusion between donor and acceptor materials for optimal bicontinuous networks is essential in producing pseudo-bilayer polymer solar cells. In this work, we investigated the influence of a doping solution-processable small molecule with high carrier mobility, 5,11-bis(triethylsilylethynyl) anthradithiophene (TES-ADT), on the performance of pseudo-bilayer polymer solar cells made of an underlayer of poly(3-hexylthiophene) (P3HT) and an upper layer of [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). By analysis of the X-ray diffraction and UV–vis absorbance spectra of P3HT:TES-ADT blend films it was demonstrated that the film crystallinity was enhanced by TES-ADT doping in the P3HT underlayer. The hole mobility extracted from the current density–voltage curves of hole-only devices based on P3HT:TES-ADT demonstrated an optimized value with proper TES-ADT doping and thermal annealing. An intermixed photoactive layer was observed for the annealed device, indicating the occurrence of interdiffusion with a large interfacial area. With improved film crystallinity and interdiffusion, the optimal device performance was obtained when 5% TES-ADT was blended with P3HT and a thermal annealing treatment at 150 °C for 1 min was conducted. At that optimal condition, the mean crystallite size was increased by 35%, and hence the enhancement of 8% and 14% in power conversion efficiency and short-circuit current density was observed, respectively.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jpccck/2014/jpccck.2014.118.issue-19/jp502331x/production/images/medium/jp-2014-02331x_0007.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/jp502331x'>ACS Electronic Supporting Info</A></P>
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Ta-Jen Huang,Chung-Ying Wu,De-Yi Chiang 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.3
Lean-burn engines can offer superior fuel efficiency but require advanced technology for NOx emission control. Electrochemical-catalytic cell has been proposed for lean DeNOx. This work demonstrates that the DeNOx rate can be enhanced by the presence of H2O and/or CO2, and can increase with increasing H2O and CO2 concentrations, although the increased extent is quite small. In the low NOx concentration range,relatively constant DeNOx rates were observed and can result in zero NOx emissions, where the presence of H2O and CO2 has important enhancement effect. Higher temperature generally results in larger N2selectivity in the low NOx concentration region.
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