溶液法制备氧化铜薄膜空穴传输材料及其光伏应用
发布时间：2018-07-26 11:06
【摘要】：太阳能作为新能源的一种越来越受到人们的关注。如何能够有效地利用这个洁净的能源是长久以来一直在被研究的课题。光伏发电因为能够把太阳能直接转化成电能而被人们寄予厚望。有机太阳电池因具有制备成本低、生产工艺简单、可制成大面积柔性器件等特点而受到关注,有机无机杂化钙钛矿型太阳电池在短短几年时间内效率超过了 22%,成为研究的又一热点。然而有机太阳电池和钙钛矿太阳电池均存在稳定性差的问题,这对于以后的产业化非常不利。在这两类太阳电池器件结构中,与活性层和电极直接接触的界面对器件的效率和稳定性有着极大的影响。因此开发新型的界面材料对于有机太阳电池和钙钬矿太阳电池的研究具有重要的意义。铜的氧化物(CuO_x),包括氧化铜(CuO)和氧化亚铜(Cu20),具有储量丰富、价格低廉、便于制备等优点。但是之前的工作有的采用需要耗费大量能量的蒸镀法,有的制备方法不利于环境友好。本文通过一种简单的方法制备得到CuO_x薄膜作为空穴传输层应用于有机太阳电池和钙钛矿太阳电池,进一步降低了器件的制备成本,提高了器件的性能和稳定性。我们采用了一种绿色、温和的方法在室温下制备了 CuO_x阳极修饰层用于高效有机太阳能电池。CuO_x薄膜可以通过在空气中简单地旋涂前驱体乙酰丙酮铜(Cu(C5H702)2)(CAA)水溶液得到,不需要退火处理。经过H_2O_2修饰和紫外臭氧处理之后,CuO_x薄膜修饰的ITO电极具有高的功函数(5.45eV)和高的光透过率。经过器件制备工艺的优化,制备了效率达到8.68%的基于PTB7:PC71BM体系的器件,相对于传统的阳极界面修饰材料PEDOT:PSS的器件效率提高了 10%。此外,使用CuO_x作为阳极修饰层制备的有机太阳能电池器件在空气中的稳定性也高于基于PEDOT:PSS阳极修饰层的器件。通过简单的低温溶液法制备了高透光率、高功函、合适的表面性能以及优异的电荷提取能力的CuO_x薄膜,将其作为空穴传输材料应用于钙钛矿MAPbI3太阳电池。CuO_x的高功函使得CuO_x/MAPbI3界面形成欧姆接触,减少了电压的损失。由于CuO_x合适的表面性能,在上面生长的MAPbI3薄膜致密、无孔洞且具有晶粒尺寸大、晶界少等优点,使得电荷复合减少,因而制备的钙钛矿太阳电池器件具有更高的短路电流和开路电压。再加上CuO_x具有优秀的空穴提取能力,基于CuO_x薄膜空穴传输层的反型平面异质结结构的钙钛矿太阳电池的光电转换效率高达17.43%,大大高于以PEDOT:PSS作为空穴传输材料的电池器件效率(11.98%)。基于CuO_x的钙钛矿器件也展现了更加优异的空气稳定性,在25℃,湿度为30%的情况下,未经封装的器件在空气中放置650 h,仍能保持90%以上的原有效率。
[Abstract]:Solar energy, as a new energy, has attracted more and more attention. How to utilize this clean energy effectively has been studied for a long time. Photovoltaic power generation is highly expected because of its ability to convert solar energy directly into electricity. Organic solar cells have attracted much attention because of their low cost, simple production process and large area flexible devices. The efficiency of organic-inorganic hybrid perovskite solar cells has exceeded 22% in a few years. However, both organic solar cells and perovskite solar cells have the problem of poor stability, which is very disadvantageous to the industrialization in the future. In these two kinds of solar cell device structures, the direct contact with the active layer and the electrode has a great influence on the efficiency and stability of the device. Therefore, the development of new interface materials is of great significance for the study of organic solar cells and calcium holmium mine solar cells. Copper oxide (CuO_x), including copper oxide (CuO) and cuprous oxide (Cu20), has the advantages of rich reserves, low price and easy preparation. However, some of the previous work is energy consuming evaporation method, some preparation methods are not conducive to environmental friendly. In this paper, CuO_x thin films are prepared by a simple method and used as hole transport layer for organic solar cells and perovskite solar cells, which further reduce the cost of fabrication and improve the performance and stability of the devices. A green and mild method has been used to prepare CuO_x anode modified layer at room temperature for high efficiency organic solar cell. CuO _ x thin film can be obtained by simply spinning the precursor (Cu (C5H702) _ 2) (CAA) solution in air. There is no need for annealing. The ITO electrode modified by H_2O_2 and UV ozone has high work function (5.45eV) and high light transmittance. The device based on PTB7:PC71BM system with an efficiency of 8.68% was fabricated by optimizing the fabrication process. Compared with the traditional anode interface modification material PEDOT:PSS, the device efficiency was increased by 10%. In addition, the stability of organic solar cell devices prepared by using CuO_x as anode modification layer in air is higher than that based on PEDOT:PSS anode modification layer. CuO_x thin films with high transmittance, high work function, suitable surface properties and excellent charge extraction ability were prepared by a simple low-temperature solution method. It is used as a hole transport material in perovskite MAPbI3 solar cell. CuO _ x makes the CuO_x/MAPbI3 interface ohmic contact and reduces the voltage loss. Due to the proper surface properties of CuO_x, the MAPbI3 thin films grown on the surface are compact, have no pores and have the advantages of large grain size and less grain boundary, so the charge recombination is reduced. Therefore, the fabricated perovskite solar cell devices have higher short-circuit current and open-circuit voltage. In addition, CuO_x has excellent hole extraction ability, and the optoelectronic conversion efficiency of perovskite solar cells based on CuO_x thin hole transport layer is 17.43, which is much higher than that of PEDOT:PSS (11.98%). The perovskite devices based on CuO_x also show better air stability. At 25 鈩，
本文编号：2145809
[Abstract]:Solar energy, as a new energy, has attracted more and more attention. How to utilize this clean energy effectively has been studied for a long time. Photovoltaic power generation is highly expected because of its ability to convert solar energy directly into electricity. Organic solar cells have attracted much attention because of their low cost, simple production process and large area flexible devices. The efficiency of organic-inorganic hybrid perovskite solar cells has exceeded 22% in a few years. However, both organic solar cells and perovskite solar cells have the problem of poor stability, which is very disadvantageous to the industrialization in the future. In these two kinds of solar cell device structures, the direct contact with the active layer and the electrode has a great influence on the efficiency and stability of the device. Therefore, the development of new interface materials is of great significance for the study of organic solar cells and calcium holmium mine solar cells. Copper oxide (CuO_x), including copper oxide (CuO) and cuprous oxide (Cu20), has the advantages of rich reserves, low price and easy preparation. However, some of the previous work is energy consuming evaporation method, some preparation methods are not conducive to environmental friendly. In this paper, CuO_x thin films are prepared by a simple method and used as hole transport layer for organic solar cells and perovskite solar cells, which further reduce the cost of fabrication and improve the performance and stability of the devices. A green and mild method has been used to prepare CuO_x anode modified layer at room temperature for high efficiency organic solar cell. CuO _ x thin film can be obtained by simply spinning the precursor (Cu (C5H702) _ 2) (CAA) solution in air. There is no need for annealing. The ITO electrode modified by H_2O_2 and UV ozone has high work function (5.45eV) and high light transmittance. The device based on PTB7:PC71BM system with an efficiency of 8.68% was fabricated by optimizing the fabrication process. Compared with the traditional anode interface modification material PEDOT:PSS, the device efficiency was increased by 10%. In addition, the stability of organic solar cell devices prepared by using CuO_x as anode modification layer in air is higher than that based on PEDOT:PSS anode modification layer. CuO_x thin films with high transmittance, high work function, suitable surface properties and excellent charge extraction ability were prepared by a simple low-temperature solution method. It is used as a hole transport material in perovskite MAPbI3 solar cell. CuO _ x makes the CuO_x/MAPbI3 interface ohmic contact and reduces the voltage loss. Due to the proper surface properties of CuO_x, the MAPbI3 thin films grown on the surface are compact, have no pores and have the advantages of large grain size and less grain boundary, so the charge recombination is reduced. Therefore, the fabricated perovskite solar cell devices have higher short-circuit current and open-circuit voltage. In addition, CuO_x has excellent hole extraction ability, and the optoelectronic conversion efficiency of perovskite solar cells based on CuO_x thin hole transport layer is 17.43, which is much higher than that of PEDOT:PSS (11.98%). The perovskite devices based on CuO_x also show better air stability. At 25 鈩，
本文编号：2145809
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