紫外猝發 的英文怎麼說
中文拼音 [zǐwàicùfā]
紫外猝發
英文
burst of ultraviolet-
We also have analyzed the photoluminescence ( pl ) spectra of some zno films, it turns out that the emission of ultraviolet light comes from the radiative recombination of excitons within nano - crystal energy band - gap, and the pl peaks move to smaller wavelength because zn are substituted by fe, co, and cu, which cause the size of the film grains smaller and the effective band - gap bigger. the red emission of zno films is due to, on the one hand, decrease of the film grains size which causes the emission intensity smaller and smaller until it disappears abruptly, on the other hand, the transition of electrons from deep donor level of the oxygen vacancies to the valence band
另外，我們還對薄膜光致發光性質進行了分析和研究，結果表明：納米結構zno薄膜的紫外發光來源於帶間激子的輻射復合發光， pl譜的帶邊發射峰發生藍移是由於fe 、 co 、 cu對zn的替代使薄膜粒子的尺寸減小，使薄膜的有效帶隙增寬； zno薄膜的紅色發光，一方面是zno顆粒尺寸的減少，帶間的激子發射峰越來越弱直至猝滅，另一方面主要是與zno晶格中的o空位有關，由深能級復合發光引起紅光發射。We consider that surface state act as quenching centers. with the irradiation, the surface state decreases and therefore luminescence of mn2 + increases. reduction of quenching centers is the result of chemical change by obtaining energy from zns excited by uv light
熒光增強的原因是由於zns基質向mn2 +離子和表面態的能量傳遞是兩個相互競爭的過程，紫外光輻照下表面猝滅中心數目不斷減少從而mn2 +離子的發光增強。
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