Reshaping Hybrid Perovskites Emission with Flexible Polymer Microcavities

Paola Lova,Francesco Di Stasio,Cesare Soci,Daniele Cortecchia,Paolo Giusto,Giovanni Manfredi,Giuseppe M Paternò,Davide Comoretto,E Puppin

doi:10.1051/epjconf/202023000006

Abstract

Thanks to versatile optoelectronic properties solution processable perovskites have attracted increasing interest as active materials in photovoltaic and light emitting devices. However, the deposition of perovskite thin films necessitates wide range solvents that are incompatible with many other solution-processable media, including polymers that are usually dissolved by the perovskite solvents. In this work, we demonstrate that hybrid perovskite thin films can be coupled with all polymer planar photonic crystals with different approaches to achieve emission intensity enhancement and reshaping using different approaches. The possibility to control and modify the emission spectrum of a solution processable perovskite via a simple spun-cast polymer structure is indeed of great interest in optoelectronic applications requiring high color purity or emission directionality. Furthermore, thanks to the ease of fabrication and scalability of solution-processed photonic crystals, this approach could enable industrial scale production of low-cost, large area, lightweight and flexible polymer-perovskite lighting devices, which may be tuned without resorting to compositional engineering.

Highlights

Thanks to a high photoluminescence efficiencies, large charge carrier diffusion, and easy solution processing, hybrid organic-inorganic perovskites have been largely investigated for a variety of flexible optoelectronic devices.[1,2,3,4,5] their deposition often requires solvents able to dissolve most of commercial polymers, limiting the possibility to couple this active media with flexible polymer devices
The necessity to process the perovskite from broad-spectrum solvents such as dimethyl formamide (DMF) or dimethyl sulfoxide (DMSO), which would dissolve many polymers, makes this perovskite incompatible with polymer processing
The top panels (a, b, and c) of Figure 1 show the schematics of the three architectures used to couple the hybrid perovskite thin films with planar polymer photonic structures

Summary

Introduction

Thanks to a high photoluminescence efficiencies, large charge carrier diffusion, and easy solution processing, hybrid organic-inorganic perovskites have been largely investigated for a variety of flexible optoelectronic devices.[1,2,3,4,5] their deposition often requires solvents able to dissolve most of commercial polymers, limiting the possibility to couple this active media with flexible polymer devices. We report on a white emitting perovskite 2,2’(ethylenedioxy)bis(ethylammonium) lead chloride and methylammonium lead iodide perovskite thin film embedded in the photonic structure with different architectures

Experimental Methods

Results and Discussion

Conclusions