Durable Perovskite UV Sensor Based on Engineered Size-Tunable Polydimethylsiloxane Microparticles Using a Facile Capillary Microfluidic Device from a High-Viscosity Precursor

Ahdieh Amjadi; Mahdi Salami Hosseini; Tahereh Ashjari; Farzaneh Arabpour Roghabadi; Vahid Ahmadi; Kiyumars Jalili

doi:10.1021/acsomega.9b03010

Durable Perovskite UV Sensor Based on Engineered Size-Tunable Polydimethylsiloxane Microparticles Using a Facile Capillary Microfluidic Device from a High-Viscosity Precursor

ACS Omega. 2020 Jan 7;5(2):1052-1061. doi: 10.1021/acsomega.9b03010. eCollection 2020 Jan 21.

Authors

Ahdieh Amjadi^{1

2}, Mahdi Salami Hosseini², Tahereh Ashjari², Farzaneh Arabpour Roghabadi^{2

3}, Vahid Ahmadi², Kiyumars Jalili¹

Affiliations

¹ Faculty of Polymer Engineering, Sahand University, Tabriz 51335-1996, Iran.
² Optoelectronic and Nanophotonic Research Group, Faculty of Electrical and Computer Engineering, Tarbiat Modares University, Tehran 14115-111, Iran.
³ Faculty of Chemical Engineering, Tarbiat Modares University, Tehran 14115-114, Iran.

Abstract

In this work, size-tunable polydimethylsiloxane (PDMS) microparticles are fabricated from a high-viscosity oil phase using a facile coflowing capillary microfluidic device and optimized aqueous phase composition. The dispersity of the microparticle size is tuned by engineering of the viscosity of the continuous phase and flow rate ratio that leads us to achieve monodisperse microparticles. Regarding the high potential of the PDMS microparticles for optical applications, efficient environmentally durable perovskite-based UV sensors are fabricated employing the designed size-tunable microparticles. Surprisingly, the UV sensors comprising CH₃NH₃PbBr₃ perovskite quantum dots as UV-sensitive nanocrystals embedded in transparent PDMS microparticles are water resistant because of the high hydrophobicity of PDMS. Remarkably, the UV sensors show a photoluminescence quantum yield as high as 75% that can be employed effortlessly as reusable leak detectors in different fluidic working systems.