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Experimental characterization and correction of non-equivalence of Solar Irradiance Absolute Radiometer
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作者 杨振岭 方伟 +1 位作者 骆杨 夏志伟 《Chinese Optics Letters》 SCIE EI CAS CSCD 2014年第10期50-54,共5页
We experimentally evaluate and correct the non-equivalence between electrical and radiative heating of solar irradiance absolute radiometer to compensate the systematic error of radiant power measurement at ambient pr... We experimentally evaluate and correct the non-equivalence between electrical and radiative heating of solar irradiance absolute radiometer to compensate the systematic error of radiant power measurement at ambient pressure. A relative difference of the order of 0.08%-0.27% between electrical and radiative heating sensitivities is shown, and the resulting non-equivalence correction factor is calculated. The radiant power measurement equation is modified using the non-equivalence correction factor, a systematic deviation of 0.19% of radiant power measurement is hence eliminated. 展开更多
关键词 HEAT SIAR Experimental characterization and correction of non-equivalence of Solar Irradiance Absolute Radiometer
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Evidences for non-equivalent centers in mixed chain nickelates (Nd_xY_(1-x))_2BaNiO_5 被引量:1
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作者 M.V.Narozhnyy S.A.Klimin +1 位作者 E.A.Popova G.Dhalenne 《Journal of Rare Earths》 SCIE EI CAS CSCD 2009年第4期603-606,共4页
Absorption spectra of the mixed chain nickelates ((NdxY1-x)2BaNiO5 were measured for different x. Experimentally two evidences for the presence of non-equivalent rare-earth centers (NEREC) were found. First, the ... Absorption spectra of the mixed chain nickelates ((NdxY1-x)2BaNiO5 were measured for different x. Experimentally two evidences for the presence of non-equivalent rare-earth centers (NEREC) were found. First, the linewidths show a very strong broadening for x when the calculated distribution over NEREC is wide. Second, a compficated lineshape of the lowest-frequency line in the region of the 4I9/2→4I1/2 electronic lransition is in good agreement with statistics of NEREC. A simple modeling for the line broadening due to NEREC is suggested. 展开更多
关键词 Haldane chains non-equivalent rare-earth centers Fourier-lransform spectroscopy
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Non-equivalent D-A copolymerization strategy towards highly efficient polymer donor for polymer solar cells 被引量:1
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作者 Ziya Shang Liuyang Zhou +5 位作者 Chenkai Sun Lei Meng Wenbin Lai Jinyuan Zhang Wenchao Huang Yongfang Li 《Science China Chemistry》 SCIE EI CSCD 2021年第6期1031-1038,共8页
D-A copolymerization is a broadly utilized molecular design strategy to construct high efficiency photovoltaic materials for polymer solar cells(PSCs),and all the D-A copolymer donors reported till now are the alterna... D-A copolymerization is a broadly utilized molecular design strategy to construct high efficiency photovoltaic materials for polymer solar cells(PSCs),and all the D-A copolymer donors reported till now are the alternate D-A copolymers with equal D-and A-units.Here,we first propose a non-equivalent D-A copolymerization strategy with unequal D-and A-units,and develop three novel non-equivalent D-A copolymer donors(PM6-D1,PM6-D2 and PM6-D3 with D/A unit ratio of 1.1:0.9,1.2:0.8 and1.3:0.7,respectively)by inserting more D units into the alternate D-A copolymer PM6 backbone to finely tune the physicochemical and photovoltaic properties of the polymers.The three non-equivalent D-A copolymers show the down-shifted highest occupied molecular orbital(HOMO)energy levels,higher hole mobility,higher degree of molecular self-assembly and higher molecular crystallinity with the increase of D-unit ratio in comparison with the alternate D-A copolymer PM6.As a result,all the three non-equivalent D-A copolymer-based PSCs with Y6 as acceptor achieve improved power conversion efficiency(PCE)with higher V_(oc),larger J_(sc)and higher FF simultaneously.Particularly,the PM6-D1:Y6 based PSC achieved a high PCE of17.71%,which is significantly higher than that(15.82%)of the PM6:Y6 based PSC and is one of the highest performances in the binary PSCs. 展开更多
关键词 polymer solar cells conjugated polymer donor materials donor-acceptor copolymers non-equivalent D-A copolymerization
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