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HUBEI STEPS UP SUPPLY-SIDE STRUCTURAL REFORM
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作者 MA XIAOWEN 《Contemporary World》 2017年第3期12-13,共2页
Spicy crayfish has many diehard fans In Beijing.People wait in line for more than two hours or more at Huda Restaurant,renowned for its spicy crayfish.But do you know where all those crayfish come from?Huang Jianxiong... Spicy crayfish has many diehard fans In Beijing.People wait in line for more than two hours or more at Huda Restaurant,renowned for its spicy crayfish.But do you know where all those crayfish come from?Huang Jianxiong,Secretary of the Communist Party of China(CPC)Qianjiang City Committee,told Beijing Review at a recent seminar in 展开更多
关键词 CPC HUBEI STEPS UP SUPPLY-SIDE STRUCTURAL REFORM
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PRESENTATION-AN INITIAL STEP TO INTRODUCE NEW STRUCTURES AND FUNCTIONS
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《Chinese Journal of Applied Linguistics》 1998年第2期49-51,共3页
Introduction In English teaching, the first task for teachers should be teaching students with clear information about the language they are learning. The presentation stage is the best way to reach this goal. In this... Introduction In English teaching, the first task for teachers should be teaching students with clear information about the language they are learning. The presentation stage is the best way to reach this goal. In this essay, we analyze the importance of this stage. How it is different from the traditional methods -grammatical explanation and translations methods- and its advantages. 展开更多
关键词 STEP PRESENTATION-AN INITIAL STEP TO INTRODUCE NEW structureS AND FUNCTIONS
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Improving performance of Cs_(2)AgBiBr_(6)solar cell through constructing gradient energy level with deep-level hole transport material
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作者 Zi-Yang Xia Wei Zhang +6 位作者 Cheng Chen Hao-Xin Wang Lin-Qin Wang Ya-Wei Miao Xing-Dong Ding Li-Cheng Sun Ming Cheng 《Rare Metals》 SCIE EI CAS CSCD 2023年第9期3004-3012,共9页
The valence band offset between Cs_(2)AgBiBr_(6)and hole transport layer(HTL)is approximately 1.00 e V,which results in high energy loss and is identified as one of the bottle necks of Cs_(2)Ag BiBr_(6)perovskite sola... The valence band offset between Cs_(2)AgBiBr_(6)and hole transport layer(HTL)is approximately 1.00 e V,which results in high energy loss and is identified as one of the bottle necks of Cs_(2)Ag BiBr_(6)perovskite solar cell(PSC)for achieving high power conversion efficiency(PCE).To tackle this problem,we propose the optimization of the energy level alignment by designing and synthesizing novel deep-level hole transport materials(HTMs).The sole introduction of deep-level HTMs successfully reduces the valence band offset between Cs_(2)Ag Bi Br_(6)and HTL,but induces the increased valence band offset at HTL/Au interface,limiting the PCE improvement.To further solve the problem and improve the PCE,the gradient energy level arrangement is constructed by combining the newly developed deep-level HTM 6,6’-(3-((9,9-dimethyl-9H-fluoren-3-yl)(4-methoxyphenyl)amino)thiophene-2,5-diyl)bis(N-(9,9-dimethyl-9H-fluoren-2-yl)-N,9-bis(4-methoxyphenyl)-9H-carbazol-3-amine)(TF)with 2,2’,7,7’-tetrakis(N,N’-dipmethoxyphenylamine)-9,9-spirobifluorene(Spiro-OMeTAD).Through optimization,an impressive PCE of 3.50%with remarkably high open-circuit voltage(V_(oc))and fill factor(FF)is achieved,qualifying it among the best pristine Cs_(2)AgBiBr_(6)PSCs. 展开更多
关键词 All-inorganic Cs_(2)AgBiBr_(6)perovskite stepped energy level structure Energy loss Moisture resistance
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