重庆理工大学学报(自然科学版)
重慶理工大學學報(自然科學版)
중경리공대학학보(자연과학판)
JOURNAL OF CHONGQING INSTITUTE OF TECHNOLOGY
2014年
8期
30-33,54
,共5页
刘强%肖贵乾%杨秋萍
劉彊%肖貴乾%楊鞦萍
류강%초귀건%양추평
Pyrite-结构%二氧化钛%密度泛函理论%光学性质
Pyrite-結構%二氧化鈦%密度汎函理論%光學性質
Pyrite-결구%이양화태%밀도범함이론%광학성질
pyrite-structure%TiO2%density functional theory%optical properties
利用第一性原理计算了立方相TiO2为黄铁矿结构时的光学性质,利用Kramers-Kronig色散关系分别对金红石矿TiO2和黄铁矿结构TiO2的复介电常数、吸收光谱等参数进行了计算,并将两者进行了比较。金红石矿TiO2的静介电常数的计算结果与实验值一致,而黄铁矿结构TiO2的静介电常数为6.02。吸收谱的对比分析结果表明:与金红石矿TiO2相比,黄铁矿结构TiO2在30 nm处增加了新的吸收峰,并且吸收谱范围扩大到了可见光区。
利用第一性原理計算瞭立方相TiO2為黃鐵礦結構時的光學性質,利用Kramers-Kronig色散關繫分彆對金紅石礦TiO2和黃鐵礦結構TiO2的複介電常數、吸收光譜等參數進行瞭計算,併將兩者進行瞭比較。金紅石礦TiO2的靜介電常數的計算結果與實驗值一緻,而黃鐵礦結構TiO2的靜介電常數為6.02。吸收譜的對比分析結果錶明:與金紅石礦TiO2相比,黃鐵礦結構TiO2在30 nm處增加瞭新的吸收峰,併且吸收譜範圍擴大到瞭可見光區。
이용제일성원리계산료립방상TiO2위황철광결구시적광학성질,이용Kramers-Kronig색산관계분별대금홍석광TiO2화황철광결구TiO2적복개전상수、흡수광보등삼수진행료계산,병장량자진행료비교。금홍석광TiO2적정개전상수적계산결과여실험치일치,이황철광결구TiO2적정개전상수위6.02。흡수보적대비분석결과표명:여금홍석광TiO2상비,황철광결구TiO2재30 nm처증가료신적흡수봉,병차흡수보범위확대도료가견광구。
A density functional theory is used in calculating the optical properties of pyrite type TiO2 . In addition,the author calculated the complex dielectric constant and absorption spectrum of rutile type TiO2 and pyrite type TiO2 through Kramers-Kronig dispersion relation and compared the results of two kinds of structure.It is suggested that the static dielectric constant of rutile type TiO2 calculated is in accord with corresponding experimental data,meanwhile,the static dielectric constant of pyrite type TiO2 is 6.02.The comparison of absorption spectrum in these two structures indicated that a new absorption peak at 30 nm can be observed in absorption spectrum of pyrite type TiO2 and the absorp-tion range extended to the visible region compared with rutile type TiO2 .