Journal
PHYSICAL REVIEW MATERIALS
Volume 3, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevMaterials.3.055201
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Funding
- Science Challenge Project [TZ2016003]
- National Key R&D Program of China [2016YFB0700700]
- National Natural Science Foundation of China [51672023, 11634003, U1530401, 61827815, 11774239]
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Transparent conductors (TCs), which bring two seemingly contraindicated properties, conductivity and transparency, together into one material, enable many critical technologies. Significant successes have been achieved for n-type TCs, such as Sn-doped In2O3, but developing their p-type counterparts has still encountered a big challenge, mainly due to the intrinsic band structure of conventional semiconductors. Here, we propose that a class of wide-gap inorganic metal halide perovskites have great potential as ideal p-type TCs, because of their inverted band structure compared to n-type TCs, i.e., they have s-like wave-function character at the top of the valence band, and p-like wave-function character at the lower valence bands and the bottom of the conduction band, which results in significantly improved p-type dopability, high hole mobility, and good optical transparency. This insight of designing p-type TCs from an inverted band structure opens an avenue for the future design of critical optoelectronic materials.
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