Design of Anti-reflection Coating for GaAs Solar Cells

利用实际测量的光谱响应结果来对gAAS单结太阳电池减反射膜进行设计优化.先初步设计单结gAAS太阳电池SIn减反射膜厚度,然后太阳电池片样品进行光谱响应测量.利用实际测量的光谱响应结果推算电池样品在AM1.5条件下的无反射时光谱响应,根据计算的结果来对gAAS单结太阳电池减反射膜厚度进行设计优化.优化结果表明83nM为gAAS单结太阳电池单层减反射膜厚度的最优值.According to the measurement results of spectral response,the anti-reflection coating for GaAs single-junction solar cells is designed.Firstly,the anti-reflection coating of SiN was fabricated but the thickness of anti-reflection coating was not optimized.Then the spectral response of the solar cell sample was measured.The no-reflection spectral response of AM 1.5 condition was calculated using the measurement results of spectral response.According to the calculation results,the optimized thickness of anti-reflection coating was designed.The optimized thickness of anti-reflection coating for GaAs single-junction solar cells is 83nm

Research of GaN-based LED Wafer Properties Radiated by Laser and Fabrication of High Luminescence Efficiency Chips with Low Forward Voltage

GaN及相关多元化合物材料（Al,Ga,In）N在短波长蓝光、紫光光发射器件及接收器件，微波和大功率半导体器件方面有诱人的应用前景和巨大的市场潜力，是近年来光电子材料领域研究的热门课题。目前GaN及GaN基器件的研究已经取得了巨大的进展，但是GaN的生长和器件制备方面还存在一些困难，GaN的p型掺杂和p型GaN的欧姆接触是其中困扰研制高性能器件的两个难题。本文首次对具有LED结构的GaN样品的表面p型层进行激光诱导再掺杂，在此基础上对其p－GaN欧姆接触进行研究，并把激光诱导的方法应用到GaN基LED的研制中成功的研制出低工作电压和高发光效率的LED。采用解析计算和数值模拟的方法对激光诱导掺杂...GaN and the related compounds such as (Al,Ga,In)N have played a key role in the research field of optoelectronic materials and devices, due to their promising applications and the great potential market in short-wavelength (e.g., blue and violet) light emission diodes (LEDs) and receiver devices, microwave and high-power devices. Although great progresses have been made in the studies of GaN-based...学位：理学博士院系专业：物理与机电工程学院物理学系_凝聚态物理学号：B20042402

QTL Mapping, Epistasis and Environmental Effects Analysis for Rice Chalkiness Trait

水稻的垩白性状是当前限制中国稻米品质提升的最主要因素.研究垩白形成机理及遗传特性,将有利于提高育种中垩白性状的改良效率.本课题组先前构建了广陆矮; 4号/佳辐占重组自交系(GJ RIL)及遗传图谱.本研究连续2年在上杭县和龙海市两地共种植6季GJ; RILs,据各季垩白性状表型数据进行遗传分析,结合遗传图谱进行QTL定位、上位性分析和环境效应分析.遗传分析发现垩白粒率和垩白度呈偏态分布,推测; 垩白性状受主效基因与微效基因共同影响.QTL定位中,垩白粒率获得3个QTLs,qPGWC2、qPGWC4和qPGWC5,遗传贡献率分别为2.84; %、3.74%和14.09%;垩白度获得3个QTLs,qDEC1、qDEC4和qDEC5,遗传贡献率分别为2.96%、4.88%和7.79%.上; 位性分析中,垩白粒率和垩白度分别获得7对和5对上位性QTLs,贡献率为0.23%~3.55%.RM307~RM518区间内同时检测到垩白粒率和垩; 白度的QTLs,并参与了垩白粒率和垩白度的上位性互作.RM598~RM5140区间内也同时检测到垩白粒率和垩白度的QTLs,也参与了垩白度的上位; 性互作.环境效应分析发现,垩白度的3个QTLs及~eqDEC10和~eqDEC9这对上位性QTLs均与2010年早季龙海种植环境发生显著或极显著; 的互作效应.Rice (Oryza sativa L.) chalkiness is the most important limiting factor; for currently improving rice quality in China. Studying rice chalky; formation mechanism and hereditary character will be helpful for; increasing the efficiency of the improvement of chalky quality in; breeding. A Guanglu'ai No.4/Jiafuzhan recombinant inbred line(GJ RIL); was developed and its genetic map was constructed previously by our; research group. In this study, the genetic analysis of rice chalkiness; was carried out basing on the chalky phenotyping data of GJ RIL from a; total of 6 growth seasons of two different locations, Shanghang county; and Longhai city, in two consecutive years. Then the QTL mapping,; epistasis and environmental effects of chalkiness were studied by using; these phenotying data and the genetic map. The genetic analysis; indicated that percentage of grains with chalkiness (PGWC) and degree of; endosperm chalkiness (DEC) showed skewness distribution, suggesting that; chalkiness trait was affected by both major and minor genes together. In; QTL mapping, three PGWC QTLs, qPGWC2, qPGWC4 and qPGWC5, were detected,; which explained 2.84%, 3.74% and 14.09% of the genetic variation,; respectively. Three DEC QTLs, qDECl, qDEC4 and qDEC5, were mapped, which; explained 2.96%, 4.88% and 7.79% of the genetic variation, respectively.; In QTL epistasis analysis, 7 and 5 pairs of epistasis QTLs for PGWC and; DEC were identified respectively, and their contribution rates ranged; from 0.23% to 3.55%. The RM307~RM518 interval harbored the PGWC and DEC; QTLs, which were involved in epistatic interaction of PGWC and DEC; respectively. The RM598~RM5140 interval also harbored the PGWC and DEC; QTLs, which also participated in epistatic interaction of DEC.; Environmental effect analysis showed the three DEC QTLs (qDECl, qDEC4; and qDEC5) and a pair of epistatic QTLs between ~eqDEC10 and ~eqDEC9 all; exhibited significant or very closely significant interaction effects; under the environmental conditions in early season at Longhai city of; Fujian province in 2010.福建省中青年教师教育科研项目; 厦门大学中央高校科研基本业务

Temperature Distribution Analytical Calculation for the Laser Lift-off of GaN/Al_2O_3 Material

【中文文摘】分析了脉冲激光作用下GaN的衬底剥离过程。利用简化的一维模型,给出一种比较直观的脉冲激光辐照下GaN/Al2O3材料温度分布的解析形式,得到了分界面温度和脉冲宽度的关系。表明,单脉冲作用下分界面的温度与加热时间的平方根成正比,并得出脉冲过后随着深度变化温度梯度的分布。在连续脉冲作用时,分界面的温度呈锯齿状不断升高。 【英文文摘】The process of laser lift-off of GaN thin films from substrates was analysed.A temperature distribution analytical calculation form of the GaN/Al_2O_3 material irradiated by pulsed laser was presented under one dimension,and the temperature calculation form of different interface was obtained.The results show that the temperature of interface is in proportion to the square root of time when the material is irradiated by single pulse laser,however,it increases saw-like when the material is irradiated by continuous pulse laser.国家自然科学基金资助项目(60276029); 福建省自然科学基金资助项目(A0210006)资助项

A High-efficiency and Low Cost Method of DNA Silver Staining in Non-denaturant Polyacrylamide Gel Electrophoresis——An Example Based on Rice

非变性聚丙烯酰胺凝胶电泳银染技术已广泛用于dnA片段检测。介绍一种本实验室改进的高效省本的非变性聚丙烯酰胺凝胶电泳银染方法,该法将固定和染色两步骤合并,整个银染过程只需16 MIn即可完成。同时,该法无需使用无水乙醇和冰乙酸,减少了硝酸银、氢氧化钠及甲醛的使用量。A method of silver staining in non-denaturant polyacrylamide gel electrophoresis has widely been used to detect DNA fragments.Here we developed a high-efficiency and low cost method of DNA silver staining in non-denaturant polyacrylamide gel electrophoresis.The whole new procedure of silver staining has combined two steps of fixation and staining into one step and can be completed within 16 min.Furthermore, the new procedure eliminates the use of ethanol and acetic acid and reduces the use amount of silver nitrate, sodium hydroxide and formaldehyde in silver steps.福建省自然科学基金计划项目(2012J01153); 福建省高校产学合作重大科技计划项目(2011N5013); 福建省科技重大专项(2013NZ0002-2

Optimization Design of Top Contact Metallization of Concentrator Solar Cells

【中文摘要】 对聚光型太阳电池表面栅极图形进行优化设计。对组成太阳电池表面栅电极的图形最小单元的各种功率损失进行了详细分析,得到了最佳栅电极间距的递推公式。优化计算了各种宽度的次栅之间的间距,并得到了相对应的功率损失比例。电极和半导体接触良好时,当次栅间距小于最佳值,电极的遮挡对于功率损失影响最大;而当次栅间距大于最佳值时,太阳电池体材料输运功率损失和次栅电极电流输运功率损失开始成为主要原因。对于高倍聚光型太阳电池来说,次栅电极的厚度相对要求厚一些。计算及分析结果可应用于聚光型太阳电池电极的设计中。 【英文摘要】 An optimum grid pattern of the concentrator solar cell top contact metallization was designed. Several power-loss mechanisms of the smallest element were analyzed detailedly. The optimum grid spacing recursion formula was deduced. The optimum grid spacing and the power-loss for the grids of different width were calculated. The shadowing loss was the biggest loss when the grid spacing was narrower than the optimum one if ohmic contact was very well. Otherwise,the current transporting power losses of the grid...中国博士后科学基金面上资助项

Analysis of Epistatic and QE Interaction Effects of QTLs for Grain Shape in Rice

本研究利用基于明恢86x佳辐占水稻重组自交系(rECOMbInAnT InbrEd lInE,rIl)构建的SSr遗传图谱,总标记数为131。联合两季的稻米粒长(gl)、粒宽(gW)、长宽比(l/W)表型数据,应用混合线性模型方法进行QTl定位,并作加性效应、上位效应以及加性QTl、上位性QTl与环境(QTl-by-EnVIrOnMEnT,QE)的互作效应分析。检测到粒长、粒宽和长宽比的加性效应QTlS分别为6个、4个和4个,贡献率分别为23.67%、21.41%和25.78%;检测到8对粒长的上位性QTlS,5对粒宽的上位性QTlS,2对长宽比的上位性QTlS,贡献率分别为16.75%、22.36%和7.55%;环境互作检测中,发现共有9个加性QTlS和7对上位性QTlS与环境发生了互作。结果表明,上位效应在粒形性状的遗传与加性效应一样起了重要作用,环境互作效应对粒形性状有一定的影响。A linkage map consisting of 131 markers was constructed by using a recombinant inbred line (RIL) population derived from the indica-indica rice cross Minghui86×Jiafuzhan.Quantitative trait loci (QTLs) was located with a mixed linear model (QTLmapper1.6) based on the grain shape parameters such as grain length (GL), grain width (GW) and length-width ratio (L/W), and made analysis of additive effects, epistatic, and the interaction effects of QTL-by-environment (QE).Six, four and four QTLs were detected to have significant additive effects for GL, GW and L/W, and the contribution rate were 23.67%、21.41% and 25.78%, respectively.Eight, five and two pairs of epistatic QTLs with significant additive-by-additive (AA) interaction effects were identified for three traits, and the contribution rate were 16.75%、22.36% and 7.55%, respectively.Significant QE interactions were found for nine additive QTLs and seven pairs of epistatic QTLs.The results indicated that the epistatic effects played an important role on the inheritance of grain shape, and the environmental factor had certain effects on the three traits.福建省自然科学基金项目(X0750053);厦门大学科技创新计划项目(XDKJCX20063004)共同资

Major QTLs Mapping and Analysis for Rice Grain Chalkiness and Grain Shape Traits

本研究用珍佳b(佳辐占/珍汕97b//珍汕97b的回交重组自交系f11,即bC1f11)x珍汕97b的f2群体,对稻米粒长、粒宽、长宽比、粒厚和垩白粒率性状进行遗传分析与QTl定位。结果表明,粒宽、长宽比、粒厚和垩白粒率均属于由多基因控制的数量性状,而粒长受一个主效基因控制。共检测到13个控制糙米粒长、粒宽、长宽比、粒厚和垩白粒率的QTlS。其中,在第3号染色体着丝粒附近rM16-rM411区间同时控制粒长、粒宽、长宽比和粒厚性状,遗传贡献率分别为49.8%、12.6%、39.3%和5.3%;在第5号染色体着丝粒附近rM7118-rM3683区间同时控制垩白粒率、粒宽、长宽比和粒厚性状,遗传贡献率分别为43.9%、44.5%、28.0%和15.0%;同时,在rM169-rM289区间也同时控制垩白粒率、粒宽、长宽比和粒厚性状,但各性状的遗传贡献率均较rM7118-rM3683区间的小。The F2 population was derived from the cross ZS97B (Zhenshan97B)×ZJB (ZhenjiaB) which was the backcross recombinant inbred line from Jiafuzhan×ZS97B.Based on the F2 population, the genetic analysis and QTL mapping of grain appearance quality traits, included grain length, grain width, grain shape (grain length-width ratio), grain thickness and PGWC (percentage of grain with chalkiness), was conducted.Grain width, grain shape, grain thickness and PGWC, belonged to the quantitative trait inheritance.But grain length showed the polygenic inheritance with a major gene.13 QTL associated with grain appearance quality traits were detected in this study.RM16-RM411 located in the pericentromeric region of rice chromosome 3 could explain 49.8%, 39.3%, 12.6%, 5.3% of the phenotypic variation, respectively, for grain length, grain shape, grain width and grain thickness.RM7118-RM3683 located in the centromeric region of rice chromosome 5 was associated with PVE (phenotypic variation explained) of 43.9%, 44.5%, 28.0% and 15.0%, respectively, for PGWC, grain width, grain thickness and grain shape.In addition, another pleiotropic QTL located between RM169 and RM289 on rice chromosome 5 was associated with less PVE for PGWC, grain width, grain thickness and grain shape than RM7118-RM3683.福建省科技创新平台建设计划项目(2007N2005);福建省科技重大专项(2008NZ0001);福建省自然科学基金项目(2011J01249);中央高校基本科研业务费专项资金(2010121088);厦门市科技计划项目(3502Z20083003)共同资

Mapping QTLs for Rice Grain Shape with QTL×Environment Interactions and Epistatic Effects Analysis

利用广陆矮4号x佳辐占水稻重组自交系构建了SSr标记的遗传图谱.联合2007年和2008年获得的两组稻米粒长(gl)、粒宽(gW)、长宽比(l/W)数据应用混合线性模型方法进行QTl定位,并作加性效应、加性x加性上位互作效应以及加性QTl、上位性QTl与环境的互作效应分析.结果显示;(1)在加性效应分析中两个群体共检测到4个控制粒长的QTl,4个控制粒宽的QTl,5个控制长宽比的QTl,贡献率分别为13.81%、15.36%和16.29%.(2)在上位互作效应分析中两个群体共检测到2对控制粒长的互作QTl,1对控制粒宽的互作QTl,3对控制长宽比的互作QTl,贡献率分别为5.77%、2.59%和7.42%.(3)环境互作检测中,发现共有13个加性QTl和4对QTl的加性x加性上位性与环境产生了互作效应.结果表明,上位性效应和加性效应都影响稻米粒形遗传,QE互作效应也对粒形有着显著的影响.In this study,a recombinant inbred line (RIL) population derived from the indica-indica rice cross ‘Guangluai 4’בJiafuzhan’ was used in mapping of Quantitative trait loci (QTLs).Based on mixed linear model QTLmapper1.6,mapping was carried out for grain shape such as grain length (GL),grain width (GW) and length-width ratio (L/W) in rice in 2007 and 2008.QTLs were determined at the one-locus and two-locus levels,and QTL-by-environment (QE) interactions were analyzed.Four,four and five QTLs were detected to have significant additive effects for GL,GW and L/W,and the contribution rate were 13.81%,15.36% and 16.29%,respectively.Two,one and three pairs of epistatic QTLs with significant additive-by-additive (AA) interaction effects (epistatic effects) were identified for the three traits,and the contribution rate were 5.77%,2.59% and 7.42%,respectively.Significant QE interactions were found for thirteen QTLs with additive effects and four pairs of epistatic QTLs.The results indicated that the epistatic and additive effects played an important role on the inheritance of grain shape,and the environmental factor had significant effects on the three traits.国家863计划项目(2007AA10Z179);福建省科技计划重点项目(2008N0122);厦门大学科技创新项目(XDKJCX20063004

Preliminary Analysis of Spatiotemporal Variation of Water Quality and Its Influencing Factors in the Jiulong River Watershed

选取闽东南九龙江流域21个典型小流域开展2010年丰(8月)、平(11月)、枯(2月)3个水期的基流水质监测,并借助gIS、多元统计分析方法识别流域水质的时空分布特征及其影响因素,为九龙江流域水质监测、管理与控制提供依据.结果表明,九龙江水质枯水期最差,平水期次之,丰水期水质较好.表征生活污水、工业废水的污染因子对水质变化的贡献率为45.58%,表征农业污染的主成分的贡献率为21.28%.nH4+-n、SrP、高锰酸盐指数、k+、Cl-、Mg2+、nA+浓度与建设用地比例、人口密度呈显著的正相关,nO3--n浓度与耕地比例有显著的正相关,自然用地面积比例与nO3--n、k+、Cl-、nA+浓度有显著的负相关.建设用地比例较大、人口较密集的小流域nH4+-n、SrP、高锰酸盐指数、k+、Cl-的浓度较高,耕地比例较大的小流域nO3--n浓度则较高.在流域水质管理上,建议提高污水处理率,并重视由于化肥施用导致的农业非点源污染对水质的影响.Twenty one sub-watersheds in the Jiulong River watershed were chosen for in-situ monitoring water quality of baseflow in flood season,dry season and average season in 2010.Geographical information system and multivariate analysis were coupled to characterize the spatiotemporal variation of water quality and identify its influencing factors.The results show that the water quality in dry season is the worst whereas the water quality in flood season is comparatively good.The first principal component representing sanitary and industrial wastewater pollution,explained 45.58% of the total variance of water quality.The second principal component concerning pollution due to agricultural activities,explained 21.28% of the total variance.NH+4-N,SRP,potassium permanganate index,K+,Cl-,Mg2+ and Na+had a significantly positive correlation with percentage of built-up and density of population.NO-3-N was correlated positively with percentage of cropland.The sub-watersheds with high proportion of build-up area and density of population show high concentration of NH+4-N,SRP,potassium permanganate index,K+,Cl-.Comparatively,the sub-watersheds with high percentage of cropland show high level of nitrate concentration.Improvement of the wastewater treatment efficiency and increased recognition of agricultural non-point source pollution were finally highlighted from watershed management perspectives.国家自然科学基金项目(40901100;40810069004);福建省自然科学基金项目(2009J01222