Benefiting from their extraordinary physical properties, methylammonium lead halide perovskites (PVKs) have attracted significant attention in optoelectronics. However, the PVK-based devices suffer from low carrier mobility and high operation voltage. Here, we utilize sorted semiconducting single-walled carbon nanotubes (95% s-SWCNTs) to enhance the performance of thin-film transistors (TFTs) based on the mixed-cation perovskite (MA1-xFAx)Pb(I1-xBrx)3, enabling mixed-dimensional solution-processed electronics with high mobility (32.25 cm2/(V s)) and low voltage (∼3 V) operation. The resulting mixed-dimensional PVK/SWCNT TFTs possess ON/OFF ratios on the order of 107, enabling the fabrication of high-gain inverters.
Bibliographical noteKAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This research was supported by the Materials Research Science and Engineering Center (MRSEC) of Northwestern University (NSFDMR-1720139). This research was supported by Material Science and Engineering (MSE) of King Abdullah University of Science and Technology. T.W. and M.H. conceived and supervised the project. C.M., S.C., L.L., R.T., and A.H. wrote the paper. C.M., Z.L., and A.H. fabricated and characterized the devices. Y.F. performed ellipsometry. S.C. synthesized unsorted and sorted s-SWCNT. L.J.L. provided
metallic SWCNTs. All authors discussed the results