Lee Yoon Ho, Ha Minjeong, Song Inho, Lee Jeong Hun, Won Yousang, Lim Seongdong, Ko Hyunhyub, Oh Joon Hak
School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.
Center for Advanced Soft Electronics, Pohang University of Science and Technology (POSTECH), Pohang 37673, Gyongbuk, Republic of Korea.
ACS Omega. 2019 Jun 7;4(6):9996-10002. doi: 10.1021/acsomega.9b00778. eCollection 2019 Jun 30.
Hybrid photovoltaics (HPVs) incorporating both organic and inorganic semiconducting materials have attracted much attention as next-generation photovoltaics because of their advantage of combining both materials. The hybridization of ZnO nanowires (NWs) and organic semiconductors is expected to be a suitable approach to overcome the limited exciton diffusion length and low electron mobility associated with current organic photovoltaics. The use of ZnO NWs allows researchers to tune nanoscale dimensions more precisely and to achieve rod-to-rod spacing below 10 nm. However, the perfect incorporation of organic semiconductors into densely packed ZnO NW arrays has yet to be achieved. In this study, we report the fabrication of ZnO NW arrays and various organic heterojunction-based HPVs using the feasible and effective vacuum-assisted double coating (VADC) method, achieving full coverage of the organic semiconductors on the compact ZnO NW arrays. The newly proposed VADC method ensures perfect infiltration and full coverage of the organic semiconductors on the densely packed NW arrays. Compared with the conventional single spin-coating process, the use of the VADC method led to 11 and 14% increases in the power conversion efficiency of P3HT:PCBM- and PBDTTT-C-T:PCBM-based HPVs, respectively. Our studies provide a feasible method for the fabrication of efficient HPVs.
结合有机和无机半导体材料的混合光伏（HPV）作为下一代光伏技术，因其结合了两种材料的优势而备受关注。氧化锌纳米线（NW）与有机半导体的杂化有望成为克服当前有机光伏中激子扩散长度有限和电子迁移率低问题的合适方法。使用氧化锌纳米线使研究人员能够更精确地调整纳米尺度尺寸，并实现低于10纳米的棒间距。然而，尚未实现将有机半导体完美地整合到紧密排列的氧化锌纳米线阵列中。在本研究中，我们报告了使用可行且有效的真空辅助双涂层（VADC）方法制造氧化锌纳米线阵列和各种基于有机异质结的混合光伏，实现了有机半导体在紧密排列的氧化锌纳米线阵列上的完全覆盖。新提出的VADC方法确保了有机半导体在紧密排列的纳米线阵列上的完美渗透和完全覆盖。与传统的单旋涂工艺相比，使用VADC方法使基于P3HT:PCBM和PBDTTT-C-T:PCBM的混合光伏的功率转换效率分别提高了11%和14%。我们的研究为制造高效混合光伏提供了一种可行的方法。
