Impact of short-time annealing of methylammonium lead iodide on the performance of perovskite solar cells prepared under a high humidity condition. (2nd January 2018)

• Record Type: Journal Article
• Authors: Jeon, Mi-Kyung; Ginting, Riski Titian; Kang, Jae-Wook
• Is Part Of: Molecular crystals and liquid crystals. Volume 660(2018)
• Page Start: 79
• Page End: 84
• Publication Date: 2018-01-02
• Subjects: Charge recombination -- charge trapping -- high humidity processing -- impedance -- perovskite solar cells -- short time annealing; Molecular crystals -- Periodicals; Liquid crystals -- Periodicals; Liquid crystals; Molecular crystals; Periodicals; 548
• DOI: 10.1080/15421406.2018.1456072
• Languages: English
• ISSNs: 1542-1406

Abstract

ABSTRACT: In this work, the effects of annealing temperature and time for one-step fabrication of mixed metal halide perovskite films were investigated. The photovoltaic performance of perovskite solar cells (PSCs) improved from 8.30 to 10.85% after being annealed at 100 °C for 10 min and exhibited negligible photocurrent hysteresis when prepared at an ambient humidity of 70%. Besides, a high annealing temperature for a short time (150 °C; 1 min) shows comparable power conversion efficiency with perovskite annealed at 100 °C for 10 min. The electronic properties of PSCs were characterized by photo induced charge extraction via linearly increasing the voltage (photo-CELIV), impedance, and intensity modulated photovoltage spectroscopy. Our finding suggests that the improvement in photovoltaic performance is correlated to the improved charge mobility, suppressed charge trapping, and prolonged recombination lifetime.