Constructing highly efficient all-inorganic perovskite solar cells with efficiency exceeding 17% by using dopant-free polymeric electron-donor materials. (September 2020)

• Record Type: Journal Article
• Authors: Ma, Junjie; Li, Yuhao; Li, Jing; Qin, Minchao; Wu, Xiao; Lv, Ziyu; Hsu, Yao-Jane; Lu, Xinhui; Wu, Yichu; Fang, Guojia
• Is Part Of: Nano energy. Volume 75(2020)
• Publication Date: 2020-09
• Subjects: All-inorganic perovskite -- Hole transport layer -- GIWAXS -- Polymeric materials -- Dopant-free; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2020.104933
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: Development of all-inorganic perovskite solar cells (PSCs) is highly desirable due to its excellent thermal stability and great potential for tandem solar cells. One main bottleneck that restricts its further development is the absence of the ideal hole-transporting materials which is critical to device performance and stability. Herein, we construct a brand-new architecture of all-inorganic PSCs via employing a series of doping-free polymeric organic photovoltaic donor materials as hole transport materials including J71, PBDB-T, PM6 with suitable energy level and carrier transport ability. The mechanism in terms of film molecular microscopic structure, electrical transport dynamics, electrical potential distribution were systematically investigated by grazing incidence wide-angle X-ray scattering (GIWAXS), conductive atomic force microscope (C-AFM) and kelvin probe force microscopy (KPFM) measurements. This work not only proposes a series of new dopant-free polymeric hole transporting materials for all-inorganic PSCs, but also demonstrates the fabrication of high efficiency devices with power conversion efficiencies over 17%, a record of all-inorganic PSCs based on dopant-free polymeric materials to our knowledge. Graphical abstract: A brand-new architecture of all-inorganic PSCs were constructed via employing a series of dopant-free polymer materials as hole transport layer including J71, PBDB-T, PM6 by offering suitable energy band and effective carrier transport property. The deep mechanism in terms of film molecular microscopic structure, electrical transport dynamics were investigated via grazing incidence wide-angle X-ray scattering measurements. Image 1 Highlights: Highly efficient all-inorganic perovskite solar cells (PSCs) based on dopant-free hole transport layer (HTL) with efficiency exceeding 17% were fabricated. Dopant-free polymeric organic photovoltaic materials including J71, PBDB-T, PM6 are employed as HTL in all-inorganic PSCs. The mechanism that affecting the charge transport of polymeric materials was revealed by investigating the material microstructure via advanced grazing incidence wide-angle X-ray scattering (GIWAXS) analysis.