TY - JOUR

T1 - One-Step Aerosol Synthesis of Thiocyanate Passivated Hybrid Perovskite Microcrystals

T2 - Impact of (Pseudo-)Halide Additives on Crystallization and Access to a Novel Binary Model

AU - Bahnmüller, Ulrich J.

AU - Krysiak, Yaşar

AU - Seewald, Tobias

AU - Yalçinkaya, Yenal

AU - Pluta, Denis

AU - Schmidt-Mende, Lukas

AU - Weber, Stefan A.L.

AU - Polarz, Sebastian

N1 - Publisher Copyright: © 2024 The Author(s). Particle & Particle Systems Characterization published by Wiley-VCH GmbH.

PY - 2024/9/2

Y1 - 2024/9/2

N2 - Hybrid Perovskite materials have gone through an astonishing development due to their unique optoelectronic behavior, leading to the creation of a wide range of synthetic strategies. As the materials’ surface is found to play a crucial role with respect to the properties, e.g. hydration, stability and carrier mobilities, considerable efforts have been made to optimize the surface through various approaches. Especially the passivation of the perovskite surface attracted a lot of attention in this field, often resulting in more complex, multi-step synthetic processes. In this study, a simple one-step aerosol-assisted synthetic approach is presented to obtain thiocyanate (SCN) passivated single-crystal MAPbBr3 microcrystals. To elucidate the role of the additive in the crystallization process, mixed (pseudo-)halide precursors are systematically investigated. The as processed, passivated microcrystals exhibit enhanced stability and charge carrier lifetimes. Additionally, a decrease in surface photovoltage, attributed to the presence of the SCN additive, is observed. Furthermore, the aerosol process is further developed resulting in a novel binary system containing MAPbBr3-SCN perovskite microcrystals and Au nanostructures. This system serves as a promising model for further investigations into potential interactions between plasmonic and semiconducting materials, with initial results indicating prolonged charge carrier lifetimes.

AB - Hybrid Perovskite materials have gone through an astonishing development due to their unique optoelectronic behavior, leading to the creation of a wide range of synthetic strategies. As the materials’ surface is found to play a crucial role with respect to the properties, e.g. hydration, stability and carrier mobilities, considerable efforts have been made to optimize the surface through various approaches. Especially the passivation of the perovskite surface attracted a lot of attention in this field, often resulting in more complex, multi-step synthetic processes. In this study, a simple one-step aerosol-assisted synthetic approach is presented to obtain thiocyanate (SCN) passivated single-crystal MAPbBr3 microcrystals. To elucidate the role of the additive in the crystallization process, mixed (pseudo-)halide precursors are systematically investigated. The as processed, passivated microcrystals exhibit enhanced stability and charge carrier lifetimes. Additionally, a decrease in surface photovoltage, attributed to the presence of the SCN additive, is observed. Furthermore, the aerosol process is further developed resulting in a novel binary system containing MAPbBr3-SCN perovskite microcrystals and Au nanostructures. This system serves as a promising model for further investigations into potential interactions between plasmonic and semiconducting materials, with initial results indicating prolonged charge carrier lifetimes.

KW - Au nanoparticles

KW - crystallization kinetics

KW - hybrid perovskite microcrystals

KW - one-step synthesis

KW - surface passivation

UR - http://www.scopus.com/inward/record.url?scp=85202927514&partnerID=8YFLogxK

U2 - 10.1002/ppsc.202400132

DO - 10.1002/ppsc.202400132

M3 - Article

AN - SCOPUS:85202927514

JO - Particle and Particle Systems Characterization

JF - Particle and Particle Systems Characterization

SN - 0934-0866

ER -