In this work, we report the achievement of transparent field effect transistors (FETs) with high performance by blending a narrow bandgap polymer PDPP2TBT into inert polystyrene (PS) matrix. Transmittance of nearly 100% across the whole visible range, as well as enhanced FET mobility compared to pure semiconductor films, is available on the blend films with a low PDPP2TBT/PS weight ratio of 0.5–1.0%. From film morphology observation, excellent transport characteristics on the blends of ultra-low semiconductor content is attributed to the formation of interlinked network of the PDPP2TBT aggregates throughout the PS matrix, which provides effective pathways for intra-chain carrier transport. The novel finding will present a promising route on the development of low-cost transparent electronics.

在这项工作中，我们报告了通过将窄带隙聚合物PDPP2TBT掺入惰性聚苯乙烯（PS）基质中而实现的高性能透明场效应晶体管（FET）的成果。PDPP2TBT / PS重量比低至0.5-1.0％的混合膜上，在整个可见光范围内的透射率接近100％，并且与纯半导体膜相比，FET迁移率更高。从薄膜形态观察，超低半导体含量的共混物具有出色的传输特性，这归因于整个PS基质中PDPP2TBT聚集体的互连网络的形成，这为链内载流子传输提供了有效途径。这一新发现将为低成本透明电子产品的发展提供一条有希望的途径。