In this work, photovoltaic properties of the PBDB-T:ITIC based-NF-PSCs were fully optimized and characterized by tuning the morphology of the active layers and changing the device architecture. First, donor/acceptor(D...In this work, photovoltaic properties of the PBDB-T:ITIC based-NF-PSCs were fully optimized and characterized by tuning the morphology of the active layers and changing the device architecture. First, donor/acceptor(D/A) weight ratios were scanned,and then further optimization was performed by using different additives, i.e. 1,8-diiodooctane(DIO), diphenyl ether(DPE),1-chloronaphthalene(CN) and N-methyl-2-pyrrolidone(NMP), on the basis of best D/A ratio(1:1, w/w), respectively. Finally,the conventional or inverted device architectures with different buffer layers were employed to fabricate NF-PSC devices, and meanwhile, the morphology of the active layers was further optimized by controlling annealing temperature and time. As a result,a record efficiency of 11.3% was achieved, which is the highest result for NF-PSCs. It's also remarkable that the inverted NF-PSCs exhibited long-term stability, i.e. the best-performing devices maintain 83% of their initial PCEs after over 4000 h storage.展开更多
文摘目的比较3种不同桩道冲洗液5.25%NaClO溶液和15.00%EDTA溶液、蒸馏水、0.20%氯己定溶液对纤维桩剪切粘结强度的影响。方法选取30颗单根管前磨牙,距釉牙骨质界上2 mm截冠,常规根管充填桩道预备后随机分为3组,分别是A组:5.25%NaClO溶液和15%EDTA溶液,B组:蒸馏水(对照组),C组:0.2%的氯己定溶液冲洗桩道,利用自酸蚀树脂水门汀(Clearfil DC Bond)将POPO纤维桩粘固于根管中。包埋并切割试样,微推出实验测试剪切粘结强度,体式显微镜观察粘结界面破坏方式,记录数据并进行统计分析。结果 C组的剪切粘结强度(5.58±0.49)MPa,高于A组(3.31±0.46)MPa(P<0.05),显著高于B组(2.06±0.26)MPa(P<0.001);界面形态学观察显示,各组样本的破坏类型均集中于混合破坏形式。结论冲洗剂的应用对纤维桩的剪切粘接强度有影响;C组的粘结效果最佳;各组样本的粘接界面多表现为混合破坏形式。
基金supported by the National Basic Research Program(2014CB643501)the National Natural Science Foundation of China(91333204,21325419)the Chinese Academy of Sciences(XDB12030200)
文摘In this work, photovoltaic properties of the PBDB-T:ITIC based-NF-PSCs were fully optimized and characterized by tuning the morphology of the active layers and changing the device architecture. First, donor/acceptor(D/A) weight ratios were scanned,and then further optimization was performed by using different additives, i.e. 1,8-diiodooctane(DIO), diphenyl ether(DPE),1-chloronaphthalene(CN) and N-methyl-2-pyrrolidone(NMP), on the basis of best D/A ratio(1:1, w/w), respectively. Finally,the conventional or inverted device architectures with different buffer layers were employed to fabricate NF-PSC devices, and meanwhile, the morphology of the active layers was further optimized by controlling annealing temperature and time. As a result,a record efficiency of 11.3% was achieved, which is the highest result for NF-PSCs. It's also remarkable that the inverted NF-PSCs exhibited long-term stability, i.e. the best-performing devices maintain 83% of their initial PCEs after over 4000 h storage.
