Effect of polystyrene treatment on the efficiency and stability of fully printable mesoscopic perovskite solar cells with carbon electrode

Abstract

Hole conductor-free, fully printable mesoscopic perovskite solar cells with carbon electrode (PM-PSCs) have a good commercialization prospect because of low-cost production and high power conversion e ciency (PCE). Currently, the problem of improving the stability of perovskite solar cells (PSCs) is very important for commercialization. Interfacial engineering using polymers is an effective method to improve the e ciency and stability of PSCs. We prepared PM-PSCs by treatment with the toluene solution containing PS on the carbon electrode of the PM-PSCs, which would improve the charge transfer and greatly suppressed charge recombination in polystyrene (PS)-treated PM-PSCs, and also could greatly prevent degradation of perovskite into PbI 2 . The PS-treated PM-PSCs showed higher stability to light and moisture than the control, and the PCE was improved from 11.31% (control) to 14.03%.

Charge transport materials for mesoscopic perovskite solar cells

“…270 Furthermore, carbon electrode treatment with a polysterene-containing toluene solution reduced perovskite agglomeration, increased optical transmission, improved charge transfer and reduced charge recombination, resulting in enhanced efficiency (14.03% vs. 11.31%) and light and ambient stability. 271 Recently, Jiang et al proposed a novel hybrid carbon electrode based on a high-temperature mp carbon (mp-C) layer and a lowtemperature highly conductive carbon (c-C) layer. 272 In this configuration, mp-C exhibited a high work function (tunable upon adding different amounts of NiO) and a large surface area which facilitated charge extraction and enhanced V OC when combined with a ZrO 2 layer thickness of B1 mm whereas c-C layer had a large conductivity which was conducive for facile charge transport.…”

“…270 Furthermore, carbon electrode treatment with a polysterene-containing toluene solution reduced perovskite agglomeration, increased optical transmission, improved charge transfer and reduced charge recombination, resulting in enhanced efficiency (14.03% vs. 11.31%) and light and ambient stability. 271…”