Q63 2003021595漫射近似理论的有效使用范围分析=Analysis of the effectiveapplication range of diffusion approximation theory[刊,中]/万春明(长春光学精密机械学院.吉林,长春(130022))//光学技术.—2002,28(2).—137-138利用蒙特...Q63 2003021595漫射近似理论的有效使用范围分析=Analysis of the effectiveapplication range of diffusion approximation theory[刊,中]/万春明(长春光学精密机械学院.吉林,长春(130022))//光学技术.—2002,28(2).—137-138利用蒙特卡罗方法模拟了半无限大生物组织内部深度分辨的光能流率的分布情况。分析了漫射近似理论的有效使用范围。当组织厚度大于3/2个光子的平均自由程时,应用漫射近似理论能得到很好的结果,反之,漫射理论不能使用。也就是说,当组织厚度x】0.1875cm时,应用漫射理论能得到很好的结果;当组织厚度z【展开更多
P318.51 2001010218紫激光辐射人肺组织的光学特性=Opticalproperties of normal and cancerous human lungtissues irradiated by a violet Kr^+ laser[刊,中]/谢树森,郑蔚,李步洪,林棋榕(福建师范大学激光研究所.福州,福建(350007)),...P318.51 2001010218紫激光辐射人肺组织的光学特性=Opticalproperties of normal and cancerous human lungtissues irradiated by a violet Kr^+ laser[刊,中]/谢树森,郑蔚,李步洪,林棋榕(福建师范大学激光研究所.福州,福建(350007)),黄志传(新加坡南洋理工大学理学院.新加坡)∥光学学报.-2000,20(2).-229-233应用光纤探测系统和自行研制的光纤探针深度计,成功实现了Kr^+紫激光辐射新鲜离体人肺组织体表面漫反射率和内部光能流率分布的精确测定。展开更多
Semiconductor nanowires （NW） possess several beneficial properties for efficient conversion of solar energy into electricity and chemical energy. Due to their efficient absorption of light, short distances for minor...Semiconductor nanowires （NW） possess several beneficial properties for efficient conversion of solar energy into electricity and chemical energy. Due to their efficient absorption of light, short distances for minority carriers to travel, high surface-to-volume ratios, and the availability of scalable synthesis methods, they provide a pathway to address the low cost-to-power requirements for widescale adaptation of solar energy conversion technologies. Here we highlight recent progress in our group towards implementation of NW components as photovoltaic and photoelectrochemical energy conversion devices. An emphasis is placed on the unique properties of these one-dimensional （1D） structures, which enable the use of abundant, low-cost materials and improved energy conversion efficiency compared to bulk devices.展开更多
In this work, we demonstrate a new kind of Pt-free counter electrode for dye-sensitized solar cells(DSCs). Polypyrrole-cobalt-carbon(PPY-Co-C) nanocomposites, with the advantages of low cost and simple preparation, sh...In this work, we demonstrate a new kind of Pt-free counter electrode for dye-sensitized solar cells(DSCs). Polypyrrole-cobalt-carbon(PPY-Co-C) nanocomposites, with the advantages of low cost and simple preparation, show favorable catalytic activity in promoting tri-iodide reduction. The DSC composed of the PPY-Co-C nanocomposite electrode exhibits an acceptable energy conversion efficiency of 6.01%, a considerable short-circuit photocurrent of 15.33 mA cm-2, and a low charge-transfer resistance of 1.5 Ω cm2. The overall performance of PPY-Co-C is superior to the carbon counterparts and comparable with the platinum reference, rendering them efficient and promising counter electrode materials for DSCs.展开更多
Interfacial engineering for the regulation of the charge carrier dynamics in solar cells is a critical factor in the fabrication of high-efficiency devices.Based on the successful preparation of highly dispersible gra...Interfacial engineering for the regulation of the charge carrier dynamics in solar cells is a critical factor in the fabrication of high-efficiency devices.Based on the successful preparation of highly dispersible graphdiyne oxide(GDYO)with a large number of functional groups,we fabricated organic solar cells employing GDYO-modified poly(3,4-ethylenedioxythiophene)/poly(styrene sulfonate)(PEDOT:PSS)as hole transport materials.Results show that theπ±πinteraction between GDYO and PEDOT:PSS is beneficial to the formation of an optimized charge carrier transfer channel and improves the conductivity and charge carrier mobility in the hole transport layer.Moreover,the improved interfacial contact contributes to the suppression of charge carrier recombination and the elevation of charge carrier extraction between the hole transport layer and the active layer.More importantly,the occurrence of charge carrier separation benefits from the optimized morphology of the active layer,which efficiently improves the performance,as proven by the results of transient absorption measurements.Therefore,with the holistic management approach to the multiobjective optimization of the charge carrier dynamics,a photoelectric conversion efficiency of 17.5%(with the certified value of 17.2%)is obtained for binary organic solar cells.All of these results indicate the potential application of the functionalized graphdiyne in the field of organic optoelectronic devices.展开更多
文摘Q63 2003021595漫射近似理论的有效使用范围分析=Analysis of the effectiveapplication range of diffusion approximation theory[刊,中]/万春明(长春光学精密机械学院.吉林,长春(130022))//光学技术.—2002,28(2).—137-138利用蒙特卡罗方法模拟了半无限大生物组织内部深度分辨的光能流率的分布情况。分析了漫射近似理论的有效使用范围。当组织厚度大于3/2个光子的平均自由程时,应用漫射近似理论能得到很好的结果,反之,漫射理论不能使用。也就是说,当组织厚度x】0.1875cm时,应用漫射理论能得到很好的结果;当组织厚度z【
文摘P318.51 2001010218紫激光辐射人肺组织的光学特性=Opticalproperties of normal and cancerous human lungtissues irradiated by a violet Kr^+ laser[刊,中]/谢树森,郑蔚,李步洪,林棋榕(福建师范大学激光研究所.福州,福建(350007)),黄志传(新加坡南洋理工大学理学院.新加坡)∥光学学报.-2000,20(2).-229-233应用光纤探测系统和自行研制的光纤探针深度计,成功实现了Kr^+紫激光辐射新鲜离体人肺组织体表面漫反射率和内部光能流率分布的精确测定。
文摘Semiconductor nanowires （NW） possess several beneficial properties for efficient conversion of solar energy into electricity and chemical energy. Due to their efficient absorption of light, short distances for minority carriers to travel, high surface-to-volume ratios, and the availability of scalable synthesis methods, they provide a pathway to address the low cost-to-power requirements for widescale adaptation of solar energy conversion technologies. Here we highlight recent progress in our group towards implementation of NW components as photovoltaic and photoelectrochemical energy conversion devices. An emphasis is placed on the unique properties of these one-dimensional （1D） structures, which enable the use of abundant, low-cost materials and improved energy conversion efficiency compared to bulk devices.
基金supported by the National Basic Research Program of China(2011CBA00702)the National Natural Science Foundation of China(21322101)+1 种基金Ministry of Education(B12015,113016A,ACET-13-0296)the Fundamental Research Funds for the Central Universities
文摘In this work, we demonstrate a new kind of Pt-free counter electrode for dye-sensitized solar cells(DSCs). Polypyrrole-cobalt-carbon(PPY-Co-C) nanocomposites, with the advantages of low cost and simple preparation, show favorable catalytic activity in promoting tri-iodide reduction. The DSC composed of the PPY-Co-C nanocomposite electrode exhibits an acceptable energy conversion efficiency of 6.01%, a considerable short-circuit photocurrent of 15.33 mA cm-2, and a low charge-transfer resistance of 1.5 Ω cm2. The overall performance of PPY-Co-C is superior to the carbon counterparts and comparable with the platinum reference, rendering them efficient and promising counter electrode materials for DSCs.
基金supported by the National Natural Science Foundation of China(21975273,21801014,21773012,and U2032112)Shandong Provincial Natural Science Foundation(ZR2021QE191)+3 种基金the Scientific Research Starting Foundation of Outstanding Young Scholar of Shandong Universitythe Future Young Scholars Program of Shandong Universitythe Fundamental Research Funds of Shandong Universitysupported by the Analysis&Testing Center of Beijing Institute of Technology。
文摘Interfacial engineering for the regulation of the charge carrier dynamics in solar cells is a critical factor in the fabrication of high-efficiency devices.Based on the successful preparation of highly dispersible graphdiyne oxide(GDYO)with a large number of functional groups,we fabricated organic solar cells employing GDYO-modified poly(3,4-ethylenedioxythiophene)/poly(styrene sulfonate)(PEDOT:PSS)as hole transport materials.Results show that theπ±πinteraction between GDYO and PEDOT:PSS is beneficial to the formation of an optimized charge carrier transfer channel and improves the conductivity and charge carrier mobility in the hole transport layer.Moreover,the improved interfacial contact contributes to the suppression of charge carrier recombination and the elevation of charge carrier extraction between the hole transport layer and the active layer.More importantly,the occurrence of charge carrier separation benefits from the optimized morphology of the active layer,which efficiently improves the performance,as proven by the results of transient absorption measurements.Therefore,with the holistic management approach to the multiobjective optimization of the charge carrier dynamics,a photoelectric conversion efficiency of 17.5%(with the certified value of 17.2%)is obtained for binary organic solar cells.All of these results indicate the potential application of the functionalized graphdiyne in the field of organic optoelectronic devices.
