The ability to arbitrarily regulate semiconductor interfaces provides the most effective way to modulate the performance of optoelectronic devices. However, less work has been reported on piezo-modulated interface eng...The ability to arbitrarily regulate semiconductor interfaces provides the most effective way to modulate the performance of optoelectronic devices. However, less work has been reported on piezo-modulated interface engineering in all-oxide systems. In this paper, an enhanced photoresponse of an all-oxide Cu2O/ZnO heterojunction was obtained by taking advantage of the piezotronic effect. The illumination density-dependent piezoelectric modulation ability was also comprehensively investigated. An 18.6% enhancement of photoresponse was achieved when applying a a-0.88% compressive strain. Comparative experiments confirmed that this enhancement could be interpreted in terms of the band modification induced by interfacial piezoelectric polarization. The positive piezopotential generated at the ZnO side produces an increase in space charge region in Cu2O, thus providing an extra driving force to separate the excitons more efficiently under illumination. Our research provides a promising method to boost the performance of optoelectronics without altering the interface structure and could be extended to other metal oxide devices.展开更多
尘螨是最常见、最主要的过敏性疾病变应原。螨体中最主要的致敏成分是1组和2组变应原（Der1、Der2）。酶联免疫吸附测定（ELISA）是检测尘螨变应原含量应用最广泛的方法．但国内定量检测尘螨变应原的方法学研究鲜见报道。本研究用重组...尘螨是最常见、最主要的过敏性疾病变应原。螨体中最主要的致敏成分是1组和2组变应原（Der1、Der2）。酶联免疫吸附测定（ELISA）是检测尘螨变应原含量应用最广泛的方法．但国内定量检测尘螨变应原的方法学研究鲜见报道。本研究用重组粉尘螨2组Der f 2（rDer f 2）．制备免疫血清，建立一种以辣根过氧化物酶系统为基础的双抗体夹心ELISA，以快速检测Der f2．现报告如下。展开更多
基金Acknowledgements This work was supported by the National Major Research Program of China （2013CB932602）, Major Project of International Cooperation and Exchanges （2012DFA50990）, the Program of Introducing Talents of Discipline to Universities, National Natural Science Foundation of China （NSFC） （Nos. 51232001, 51172022, 51372023）, the Research Fund of Co-construction Pro- gram from Beijing Municipal Commission of Education, the Fundamental Research Funds for the Central Universities, and the Program for Changjiang Scholars and Innovative Research Teams in Universitiesy.
文摘The ability to arbitrarily regulate semiconductor interfaces provides the most effective way to modulate the performance of optoelectronic devices. However, less work has been reported on piezo-modulated interface engineering in all-oxide systems. In this paper, an enhanced photoresponse of an all-oxide Cu2O/ZnO heterojunction was obtained by taking advantage of the piezotronic effect. The illumination density-dependent piezoelectric modulation ability was also comprehensively investigated. An 18.6% enhancement of photoresponse was achieved when applying a a-0.88% compressive strain. Comparative experiments confirmed that this enhancement could be interpreted in terms of the band modification induced by interfacial piezoelectric polarization. The positive piezopotential generated at the ZnO side produces an increase in space charge region in Cu2O, thus providing an extra driving force to separate the excitons more efficiently under illumination. Our research provides a promising method to boost the performance of optoelectronics without altering the interface structure and could be extended to other metal oxide devices.
文摘尘螨是最常见、最主要的过敏性疾病变应原。螨体中最主要的致敏成分是1组和2组变应原（Der1、Der2）。酶联免疫吸附测定（ELISA）是检测尘螨变应原含量应用最广泛的方法．但国内定量检测尘螨变应原的方法学研究鲜见报道。本研究用重组粉尘螨2组Der f 2（rDer f 2）．制备免疫血清，建立一种以辣根过氧化物酶系统为基础的双抗体夹心ELISA，以快速检测Der f2．现报告如下。
