CAJ | 학술논문

以硝酸镧、醋酸钡、钛酸四丁酯为原料，采用溶胶一凝胶旋涂法制备掺La的钛酸钡薄膜，研究薄膜的晶体结构、表面形貌、紫外-可见光吸收性能及光学带隙。研究结果表明，纯钛酸钡和掺La钛酸钡薄膜均为单一四方钙钛矿结构，La3＋的引入可以使钛酸钡薄膜在可见光区的透过率和光学带隙有一定程度下降，而退火温度对掺镧钛酸钡薄膜光学带隙基本无影响。
이초산란、작산패、태산사정지위원료，채용용효일응효선도법제비참La적태산패박막，연구박막적정체결구、표면형모、자외-가견광흡수성능급광학대극。연구결과표명，순태산패화참La태산패박막균위단일사방개태광결구，La3＋적인입가이사태산패박막재가견광구적투과솔화광학대극유일정정도하강，이퇴화온도대참란태산패박막광학대극기본무영향。
La-doped barium titanate thin films were made by using sol-gel spin coating and lanthanum nitrate, barium acetate and tetrabutyl titanate. The crystal structure, surface morphology, absorptivity of ultraviolet and visible light and optical bandgap of thin films have been investigated. It is indicated that pure and La-doped barium titanate thin films are single phase tetragonal perovskite structure. Addition of La3＋ can lead to the decrease of transmittance of barium titanate thin films at visible light region and optical bandgap. The annealing temperature has no obvious effect on optical bandgap of La-doped barium titanate thin films.