Influence of structural defects in solution-processed InZnO semiconductors on the electrical stability of thin-film transistors

Direct Correlation of Charge Carrier Transport to Local Crystal Quality in Lead Halide Perovskites

“…Functional materials produced using solution processing techniques offer a compelling route toward the fabrication of low-cost, high-performance optoelectronic and electronic devices. While promising, solution processing can intrinsically introduce micro- and nanoscale structural heterogeneities, particularly for cases in which a material’s chemistry and morphology are determined by kinetically controlled approaches like spin or drop casting. − Understanding the impact of such heterogeneities on a material’s functional properties remains an experimental challenge, even while their importance is increasingly evident . For example, in solution processed organic thin films, variation in excited-state response and relaxation rates have been linked to mesoscale structural defects. , Structural defects introduced during fabrication have been linked to both reduced stability and photoconversion efficiency (PCE) in thin-film lead halide perovskite (LHP) photovoltaics. ,, Another piece of evidence, albeit more circumstantial, can be found with the LHP CsPbBr 3 , where the range of reported charge carrier mobilities spans more than 2 orders of magnitude (20–4500 cm 2 /(V s)). − While some of this variability likely stems from different measurement techniques, sample-to-sample differences cannot be overlooked.…”