Abstract
The effect of the diameter of randomly arranged silver nanowires on the optical haze of silver nanowire transparent conductive films was studied. Proposed simulation model behaved similarly with the experimental results, and was used to theoretically study the optical haze of silver nanowires with diameters in the broad range from 30 nm and above. Our results show that a thickening of silver nanowires from 30 to 100 nm results in the increase of the optical haze up to 8 times, while from 100 to 500 nm the optical haze increases only up to 1.38. Moreover, silver nanowires with diameter of 500 nm possess up to 5% lower optical haze and 5% higher transmittance than 100 nm thick silver nanowires for the same 10-100 Ohm/sq sheet resistance range. Further thickening of AgNWs can match the low haze of 30 nm thick AgNWs, but at higher transmittance. The results obtained from this work allow deeper analysis of the silver nanowire transparent conductive films from the perspective of the diameter of nanowires for various optoelectronic devices.
Highlights
Transparent conductive films (TCFs) – an important component of many optoelectronic devices – serve in liquid crystal displays, solar cells, touchscreens, light-emitting diodes and others.[1,2,3,4,5,6,7,8] Indium tin oxide (ITO) dominates as TCF in the electronics industry.[9]
Shaped application in new generation devices.10–14 Silver nanowire (AgNW) were randomly spread across a polyethylene terephthalate (PET) substrate according to the following steps: (i) initially, AgNWs were orderly arranged; (ii) each AgNW was arbitrarily shifted along X and Y axes for distances ranging from -L to L, where L is the length of AgNWs; (iii) and each AgNW was arbitrarily rotated within X and Y axes for the angle ranging from -90 to 90 degrees
The variation of SC and d of AgNWs allows tuning the optical haze of AgNW TCFs for many optoelectronic applications
Summary
Transparent conductive films (TCFs) – an important component of many optoelectronic devices – serve in liquid crystal displays, solar cells, touchscreens, light-emitting diodes and others.[1,2,3,4,5,6,7,8] Indium tin oxide (ITO) dominates as TCF in the electronics industry.[9] the high fabrication cost and brittleness of ITO films complicates its application in new generation devices.[10,11,12,13,14] Silver nanowire (AgNW) TCFs demonstrate optical and electrical properties comparative to ITO films while offering reduced fabrication cost and good flexibility.[15,16,17,18,19,20,21,22,23] AgNWs with various diameters and surface coverage, enhanced by plasmon resonance and strong near-field coupling effects, allow easy tuning of the transmittance and sheet resistance in a broad range.[24,25,26,27,28,29,30,31] an optical haze of the AgNW TCFs – being a crucial factor in optoelectronic devices – has remained elusive
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