本文選題：單分散 + 量子點　； 參考：《蘇州大學》2014年碩士論文

【摘要】：半導體量子點由于其優(yōu)異的單分散性、均一度以及尺寸可調等特點而在基礎研究與應用中倍受科研工作者的矚目，基于量子點太陽能電池有可能超越傳統(tǒng)硅基電池28%的極限理論轉換效率而被廣泛研究。量子點的單分散性、尺寸、形貌都能夠影響半導體量子點以及太陽能電池的電池性能，因此發(fā)展合適的化學方法制備高質量量子點是推動量子點太陽能電池走向應用化、規(guī)�；那疤崤c基礎。目前通常使用高溫熱注射法及在此基礎上的一鍋法等改進方法來合成量子點，但是這些方法一般都使用了毒性較大或者價格昂貴的藥品作為反應試劑。因此，發(fā)展一些反應條件溫和、反應成本低廉、環(huán)境污染小、易規(guī)�；a(chǎn)的高質量量子點顯得尤為重要。 我們嘗試著通過一些溫和的反應合成CdS量子點，并將其用在聚合物/量子點雜化太陽能電池中。本論文取得的研究成果如下： 1.研究了反應條件對量子點合成的影響，提出了柴油體系量子點的優(yōu)化條件。在此基礎上發(fā)展了一種新型柴油體系的CdS量子點綠色合成路線（200℃），以CdO作為鎘源，，以硫粉作為硫源，商用0#柴油作為溶劑，油酸（OA）作為配體制備缺陷峰不明顯、帶有納米簇（325nm）的高質量藍光硫化鎘量子點。 2.通過熱溶劑法在廉價的0#商用柴油中合成單分散好、結晶性高的優(yōu)質CdS量子點，并將其摻雜在3-己基噻吩聚合物（P3HT）、富勒烯衍生物（PCBM）混合結構中作為光敏層制成聚合物/量子點雜化結構太陽能電池，摻雜單分散CdS量子點后的太陽能電池比未摻雜光電轉換效率（PCE）有25%的提高，另外短路電流、開路電壓、填充因子分別為Jsc=7.23mA/cm2，Voc=0.61V，F(xiàn)F=57.0%。優(yōu)異的電池性能歸功于摻雜CdS量子點后電池對350-550nm波長的太陽光吸收有所增強，并使得短路電流有顯著提高。
[Abstract]:Semiconductor quantum dots (QDs) have attracted the attention of researchers in basic research and applications due to their excellent monodispersity, uniformity and adjustable size. Quantum dot solar cells (QDs) have been widely studied based on their potential to exceed the limit theoretical conversion efficiency of 28% for conventional silicon based cells. The monodispersity, size and morphology of quantum dots can affect the performance of semiconductor quantum dots and solar cells. Therefore, the development of appropriate chemical methods to prepare high quality quantum dots is to promote the application of quantum dots solar cells. The premise and foundation of scale. At present, quantum dots are synthesized by high temperature thermal injection method and one-pot method based on this method. However, these methods usually use toxic or expensive drugs as reaction reagents. Therefore, it is very important to develop some high quality quantum dots with mild reaction conditions, low cost, low environmental pollution and easy to be produced on a large scale. We try to synthesize CDs quantum dots through some mild reactions and use them in polymer / quantum dot hybrid solar cells. The research results of this paper are as follows: 1. The effect of reaction conditions on the synthesis of quantum dots was studied. On this basis, a green synthesis route of CDs quantum dots for a new diesel oil system was developed. The defect peaks of CDs quantum dots were not obvious by using CDO as cadmium source, sulfur powder as sulfur source, commercial 0# diesel oil as solvent and oleic acid (OAA) as ligand. High quality cadmium sulphide quantum dots with nano-clusters 325nm. High quality CDs quantum dots with good dispersion and high crystallinity were synthesized in cheap commercial diesel oil by hot solvent method. The polymer / quantum dot hybrid solar cells were prepared by doping it into the mixed structure of 3-hexylthiophene polymer (P3HT), fullerene derivative (PCBM) as a Guang Min layer. The photoconversion efficiency of doped CDs QDs is increased by 25%, and the short circuit current, open circuit voltage and filling factor are 7.23 Ma / cm ~ 2 Voc0.61V / FF ~ (57.0). The excellent performance of the battery is attributed to the enhanced solar absorption of 350-550nm wavelength after doping CDs quantum dots and the remarkable improvement of short-circuit current.
【學位授予單位】：蘇州大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM914.4;O471.1

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本文編號：2020712