# Novel temperature operated electrooptical materials based on K2ZnCl4: PVA polymer nanocomposites

## TL;DR

This study reports temperature-dependent electrooptical properties of K2ZnCl4 nanocrystals embedded in PVA, revealing enhanced efficiency within a specific temperature range due to structural modulation.

## Contribution

It introduces novel temperature-operated electrooptical nanocomposites based on K2ZnCl4 with detailed analysis of size, content, and temperature effects on EOE performance.

## Key findings

- Maximum EOE efficiency of 1.4 pm/V at 375-420 K
- EOE efficiency depends on nanocrystal size and content
- Bulk-like EOE performance achieved at 1200 nm size

## Abstract

We have discovered significant temperature anomalies of the linear electrooptical (EOE) coefficients for the K2ZnCl4 nanocrystallites embedded into the polymer matrices. The EOE efficiency was operated by external dc-electric field and UV polarized laser light. The maximal enhancement of EOE output was achieved within the temperature range 375 K-420 K. This temperature range corresponds to existence of incommensurate structural modulation. The maximally achieved field induced EOE efficiency was equal to about 1.4 pm/V for off-diagonal EOE tensor component. The size and NC content dependences have been explored for the size range (20 nm-1500 nm) and contents varying within the 25%-35%. For the sizes about 1200 nm, the EOE is commensurable with the EOE of the bulk crystals and is equal to about 0.6 pm/V.

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Source: https://tomesphere.com/paper/1904.10725