title: Low Temperature Solution-Processed Sb:SnO2Nanocrystals for Efficient Planar Perovskite Solar Cells.
abstract: Inorganic metal oxide electron-transport layers (ETLs) have the potential to yield perovskite solar cells with improved stability, but generally need high temperature to form conductive and defect-less forms, which is not compatible with the fabrication of flexible and tandem solar cells. Here, we demonstrate a facile strategy for developing efficient inorganic ETLs by doping SnO2nanocrystals (NCs) with a small amount of Sb using a low-temperature solution-processed method. The electrical conductivity was remarkably enhanced by Sb-doping, which increased the carrier concentration in Sb:SnO2NCs. Moreover, the upward shift of the Fermi level owing to doping results in improved energy level alignment, which led to reduced charge recombination, and thus longer electron recombination lifetime and improved open-circuit voltage (VOC). Therefore, Sb-doping of SnO2significantly enhanced the photovoltaic performance of planar perovskite devices by increasing the fill factor and VOC, and reducing photocurrent hysteresis, extending the potential application of low-temperature-processed ETLs in future flexible and tandem solar cells.
authors: Department of Mechanical and Materials Engineering, Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, USA.
authors: Yang
authors: Y
authors: Bai
authors: Department of Mechanical and Materials Engineering, Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, USA.
authors: Yanjun
authors: Y
authors: Fang
authors: Department of Mechanical and Materials Engineering, Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, USA.
authors: Yehao
authors: Y
authors: Deng
authors: Department of Mechanical and Materials Engineering, Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, USA.
authors: Qi
authors: Q
authors: Wang
authors: Department of Mechanical and Materials Engineering, Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, USA.
authors: Jingjing
authors: J
authors: Zhao
authors: Department of Mechanical and Materials Engineering, Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, USA.
authors: Xiaopeng
authors: X
authors: Zheng
authors: Department of Mechanical and Materials Engineering, Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, USA.
authors: Yang
authors: Y
authors: Zhang
authors: Department of Mechanical and Materials Engineering, Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, USA. jhuang2@unl.edu.
authors: Jinsong
authors: J
authors: Huang
mesh_terms: D000965:Antimony / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry*; D011211:Electric Power Supplies; D053758:Nanoparticles / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D012993:Solar Energy; D012996:Solutions; D013696:Temperature; D014025:Titanium / Q000737:chemistry*
chemical_list: D017610:Calcium Compounds; D010087:Oxides; D012996:Solutions; C059910:perovskite; C091696:antimony oxide; D000965:Antimony; D014025:Titanium
keywords: doping; low temperature; perovskite solar cells; stability; tin oxide