發(fā)布時間：2019-05-14 06:23

【摘要】：鈣鈦礦太陽能電池近幾年來發(fā)展迅速,主要是因?yàn)闊o機(jī)-有機(jī)雜化鈣鈦礦材料的很多特性符合太陽能電池的要求。本文主要是對鈣鈦礦太陽能電池的陽極修飾層和活性層做了一些研究,對于陰極修飾層的研究已經(jīng)有很多,將PC61BM用PC71BM、BCP、ICBA、C60、ZnO等代替作為陰極修飾層,或者在PC61BM與Ag電極之間插入LiF或者PEIE偶極層,還有研究使用不同的電極(Al、Ag、Au、Ca)等。這些研究都是針對電池的陰極和陰極修飾層。但是影響電池最終效率的不僅是電子傳輸,還有電子空穴的產(chǎn)生和空穴的傳輸。如果電子和空穴的傳輸不對稱,那么多余的電子就會被湮滅掉,并不能轉(zhuǎn)化為實(shí)際的效率。電子的擴(kuò)散長度要比空穴的擴(kuò)散長度短,我們不能只研究電子的傳輸而忽略空穴的傳輸。本文對反型鈣鈦礦太陽能電池的活性層和陽極修飾層的制備做了一系列的探討研究:(1)研究了器件活性層的制備條件,通過PbCl2對活性層的摻雜,提高了器件的能量轉(zhuǎn)化效率,并且摻雜后的器件回滯現(xiàn)象得到一定改善。這里研究了不同的PbCl2摻雜濃度(PbI2:PbCl2=2:1、PbI2:PbCl2=1:1 和 PbI2:PbCl2=1:2)、MAI 使用濃度(10 mg/mL到40mg/mL,每10 mg/mL遞增)和退火時間(10min到40 min,共分為五種退火時間)的優(yōu)化,得出最優(yōu)的器件制備條件。通過摻雜器件和純碘器件的形貌、吸收系數(shù)和外量子效率的對比分析,得出摻雜器件的性能優(yōu)于純碘器件。最后還比較了兩種制備方法下器件的回滯現(xiàn)象,通過J-V圖像我們可以得出,摻雜后的器件,回滯現(xiàn)象得到明顯改善,提高了器件的性能。(2)基于結(jié)構(gòu)為 ITO/PEDOT:PSS(1%PEG)/CH3NH3PbIxCl3-x/PC61BM/Ag的器件,對空穴傳輸層PEDOT:PSS做了研究,通過PEG摻雜陽極修飾層PEDOT:PSS發(fā)現(xiàn)器件的短路電流密度有了很大提升,能量轉(zhuǎn)化率從7.5%提高到10%以上,并且器件J-V曲線的回滯現(xiàn)象得到明顯的減弱,器件性能得到明顯提升。這里研究了 PEG選用的相對分子量(200、400、1000、4000)和摻雜濃度(0.5%、1%、2%、4%)。通過電流密度-電壓測試、吸收和外量子效率測試、瞬態(tài)測試、電容-電壓測試、XRD測試分析了器件能量轉(zhuǎn)化效率的提升和回滯現(xiàn)象的改善。
[Abstract]:Perovskite solar cells have developed rapidly in recent years, mainly because many characteristics of inorganic-organic hybrid perovskite materials meet the requirements of solar cells. In this paper, the anode modification layer and active layer of perovskite solar cells have been studied, and there have been a lot of research on cathode modification layer. PC61BM is replaced by PC71BM,BCP,ICBA,C60,ZnO as cathode modification layer. Or insert LiF or PEIE dipolar layer between PC61BM and Ag electrode, and use different electrode (Al,Ag,Au,Ca). These studies are aimed at the cathode and cathode modification layer of the battery. However, the final efficiency of the battery is not only electronic transmission, but also the generation of electronic holes and hole transmission. If the transmission of electrons and holes is asymmetrical, then the superfluous electrons will be annihilated and cannot be translated into actual efficiency. The diffusion length of electrons is shorter than that of holes. We can not only study the transmission of electrons but ignore the transmission of holes. In this paper, the preparation of active layer and anode modified layer of reverse perovskite solar cell was studied: (1) the preparation conditions of active layer of the device were studied, and the doping of active layer by PbCl2 was carried out. The energy conversion efficiency of the device is improved, and the lag phenomenon of the doping device is improved to a certain extent. Different PbCl2 doping concentrations (PbI2:PbCl2=2:1,PbI2:PbCl2=1:1 and PbI2:PbCl2=1:2), MAI concentrations (10 mg/mL to 40 mg / mL, increasing per 10 mg/mL) and annealing time (10min to 40 min,) have been studied here. The optimization of annealing time is divided into five kinds of annealing time, and the optimal fabrication conditions are obtained. Through the comparative analysis of the morphology, absorption coefficient and external quantum efficiency of the doping device and the pure iodine device, it is concluded that the performance of the doping device is better than that of the pure iodine device. Finally, the lag phenomenon of the device under the two fabrication methods is compared. Through the J 鈮，

本文編號：2476497