本文選題：CdSxSe1-x + ZnxCd1-xSySe1-y�。� 參考：《蘇州大學(xué)》2015年碩士論文

【摘要】：如今,科技的發(fā)展在迅速帶動(dòng)社會(huì)經(jīng)濟(jì)的同時(shí)也對(duì)人類生活的環(huán)境產(chǎn)生了不可忽視的影響。近年來(lái),汽車尾氣、工業(yè)廢氣等各種污染氣體的大量排放,使得空氣污染問(wèn)題日益嚴(yán)重,而各大城市的霧霾天氣也越來(lái)越多,于是開(kāi)發(fā)能夠準(zhǔn)確快速探測(cè)各種目標(biāo)氣體的高質(zhì)量傳感器是科學(xué)研究的重要任務(wù)之一。對(duì)于性能優(yōu)良的氣敏傳感器來(lái)說(shuō),不僅需要具備對(duì)目標(biāo)氣體有好的選擇性和高的靈敏度,更需要擁有強(qiáng)的穩(wěn)定性、長(zhǎng)的壽命和低的操作溫度。為了提升材料的各方面氣敏性能,人們開(kāi)始尋找一些外在條件的輔助作用,于是可見(jiàn)光增強(qiáng)的氣敏材料就成了當(dāng)今研究的熱點(diǎn)。本論文研究?jī)?nèi)容包括以下三個(gè)方面:(1)通過(guò)物理氣相沉積法,以金作為催化劑成功的制備了CdSxSe1-x納米帶。納米帶高的比表面積能夠有效地促進(jìn)載流子的傳輸,使其在基于可見(jiàn)光增強(qiáng)的氣敏傳感器方面表現(xiàn)出良好的性能。與黑暗條件下相比,該傳感材料在可見(jiàn)光照條件下的最佳操作溫度降低了100℃。而更為重要的是,CdSxSe1-x納米帶能應(yīng)用于可見(jiàn)光激發(fā)的氣敏元件用來(lái)在常溫下檢測(cè)乙酸氣體。(2)基于以上工作的基礎(chǔ)上,通過(guò)調(diào)控產(chǎn)物沉積的位置合成了組成可變的CdSxSe1-x納米帶。本實(shí)驗(yàn)主要研究了CdSxSe1-x納米帶的兩種組成結(jié)構(gòu)(x=0.47和x=0.79)的熒光特性,研究結(jié)果表明產(chǎn)物的熒光峰強(qiáng)度與入射光的功率大小密切相關(guān)。(3)使用CdSe和ZnS為原材料成功制備出四元化合物ZnxCd1-xSySe1-y納米帶,并通過(guò)沉積位置溫度的變化來(lái)控制納米帶的組成。實(shí)驗(yàn)中主要選取了四種成分的ZnxCd1-xSySe1-y納米帶進(jìn)行了研究,四個(gè)樣品均只顯示出一個(gè)單一的接近帶邊緣的發(fā)射峰,且峰的位置能夠從677 nm移動(dòng)到585 nm。這種成分可控的材料為多光譜探測(cè)、全光譜太陽(yáng)能電池以及超寬可調(diào)納米激光器等多個(gè)領(lǐng)域的發(fā)展開(kāi)辟了一個(gè)新的方向。
[Abstract]:Nowadays, the development of science and technology not only drives the social economy rapidly, but also has a noticeable influence on the environment of human life. In recent years, the air pollution problem is becoming more and more serious due to the emission of various kinds of pollution gases, such as automobile exhaust gas, industrial exhaust gas and so on, and the weather of haze in every big city is also more and more. Therefore, the development of high-quality sensors that can accurately and quickly detect all kinds of target gases is an important part of scientific research. For the gas sensor with good performance, it is necessary not only to have good selectivity and high sensitivity to the target gas, but also to have strong stability, long life and low operating temperature. In order to improve the gas sensing properties of materials, people began to look for some auxiliary effects of external conditions, so the visible light-enhanced gas sensing materials have become the focus of research today. The main contents of this thesis are as follows: 1) CdSxSe1-x nanobelts were successfully prepared by physical vapor deposition with gold as catalyst. The high specific surface area of nanobelts can effectively promote the transport of carriers and make them exhibit good performance in gas-sensing sensors based on visible light enhancement. Compared with the dark condition, the optimum operating temperature of the sensing material under visible illumination is reduced by 100 鈩，

本文編號(hào)：1794096