演讲嘉宾-W. Strek

W. Strek
波兰科学院低温与结构研究所
Prof. Wiesław Stręk, graduated in physics from the Adam Mickiewicz University in 1971. Since 1971 he has been working at the Institute of Low Temperature and Structure Research, PAS, in Wrocław. He was awarded the PhD degree in 1979. He heads the Institute’s Departament of Spectroscopy of Excited States which researches luminescent materials, nonlinear optics, biophysics, sol gel technology and nanotechnology. He has authored or co-authored over 400 publications (over 3000 quotes, Hirsh index Hirscha-23), 15 patents and patent applications. He has pursued many scientific internships in Denmark, France, Germany, Finland, Brazil, USA, Israel. He lectured at numerous Polish and international conferences (over 100 lectures) and has acted as a visiting professor (Israel, Denmark, France, Brazil). He has organized and co-organized many (over 30) Polish and international conferences, e.g. Rare Earth Spectroscopy, Excited States of Transition Elements, Intl Conf. on f-Elements, Intl Workshop Structure&Spectroscopy of Rare Earths, Conference on Luminescence, So-Gel Materials, Rare Earth Materials. He has advised on 7 PhD theses.
The scope of his research activities encompasses optical properties of rare earth compounds and transition metals, electron relaxation theory (radiative, non-radial transitions, cooperative reactions), laser spectroscopy, optical sensor and biosensors, laser materials, photodynamic therapy, technologies of luminescent materials (nanophosphors), transparent ceramics, porous thermoinsulation materials, nanoceramic materials for fuel cells, criotherapy, Rare earth ions and transition metal ions doped solgel materials, photonic structures, nanomaterials, nanoceramics and crystals.
演讲题目:Application of laser induced emission from graphene foam for white lighting
主题会场大会报告
开始时间
结束时间
内容摘要

The intense white light emission is reported for graphene foam in vacuum upon irradiation with cw infrared laser diode. It strongly depends on excitation laser density. The lighting is accompanied by efficient photocurrent and electron emissions. The laser induced white light emission is the nonlinear process characterized by threshold behavior, exponentially scaled by the excitation power density. The order of scaling decreases with excitation density. The white lighting was investigated for different excitation wavelengths.  It was found the lighting threshold decreased with decreasing excitation wavelength. The effect of applied voltage on intensity of white lighting was investigated. The light intensity may be tuned with applied voltage. The bias effect suggests the possibility for designing new photoconvertors  working as electric generators and  phototransistors.  Applications of LIWE of graphene foam for sustained white lighting sources are presented. 

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联系我们
400-110-3655   

E-mail: meeting@c-gia.cn   meeting01@c-gia.cn

参展电话:13646399362(苏老师)

主讲申请:19991951101(王老师)

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Copyright © 中国国际石墨烯创新大会 版权所有     运营机构:北京现代华清材料科技发展中心
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凯发_W. Strek

凯发

演讲嘉宾-W. Strek

W. Strek
波兰科学院低温与结构研究所
Prof. Wiesław Stręk, graduated in physics from the Adam Mickiewicz University in 1971. Since 1971 he has been working at the Institute of Low Temperature and Structure Research, PAS, in Wrocław. He was awarded the PhD degree in 1979. He heads the Institute’s Departament of Spectroscopy of Excited States which researches luminescent materials, nonlinear optics, biophysics, sol gel technology and nanotechnology. He has authored or co-authored over 400 publications (over 3000 quotes, Hirsh index Hirscha-23), 15 patents and patent applications. He has pursued many scientific internships in Denmark, France, Germany, Finland, Brazil, USA, Israel. He lectured at numerous Polish and international conferences (over 100 lectures) and has acted as a visiting professor (Israel, Denmark, France, Brazil). He has organized and co-organized many (over 30) Polish and international conferences, e.g. Rare Earth Spectroscopy, Excited States of Transition Elements, Intl Conf. on f-Elements, Intl Workshop Structure&Spectroscopy of Rare Earths, Conference on Luminescence, So-Gel Materials, Rare Earth Materials. He has advised on 7 PhD theses.
The scope of his research activities encompasses optical properties of rare earth compounds and transition metals, electron relaxation theory (radiative, non-radial transitions, cooperative reactions), laser spectroscopy, optical sensor and biosensors, laser materials, photodynamic therapy, technologies of luminescent materials (nanophosphors), transparent ceramics, porous thermoinsulation materials, nanoceramic materials for fuel cells, criotherapy, Rare earth ions and transition metal ions doped solgel materials, photonic structures, nanomaterials, nanoceramics and crystals.
演讲题目:Application of laser induced emission from graphene foam for white lighting
主题会场大会报告
开始时间
结束时间
内容摘要

The intense white light emission is reported for graphene foam in vacuum upon irradiation with cw infrared laser diode. It strongly depends on excitation laser density. The lighting is accompanied by efficient photocurrent and electron emissions. The laser induced white light emission is the nonlinear process characterized by threshold behavior, exponentially scaled by the excitation power density. The order of scaling decreases with excitation density. The white lighting was investigated for different excitation wavelengths.  It was found the lighting threshold decreased with decreasing excitation wavelength. The effect of applied voltage on intensity of white lighting was investigated. The light intensity may be tuned with applied voltage. The bias effect suggests the possibility for designing new photoconvertors  working as electric generators and  phototransistors.  Applications of LIWE of graphene foam for sustained white lighting sources are presented. 

关于主办方

联系我们
400-110-3655   

E-mail: meeting@c-gia.cn   meeting01@c-gia.cn

参展电话:13646399362(苏老师)

主讲申请:19991951101(王老师)

官方微信订阅号
Copyright © 中国国际石墨烯创新大会 版权所有     运营机构:北京现代华清材料科技发展中心
grapchina.org 京ICP备10026874号-12   grapchina.cn 京ICP备10026874号-23
京公网安备 11010802023402号
分享到: