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We report the successful fabrication of a superlattice film composed of PbS colloidal quantum dots (QDs) with a three-dimensionally coincident crystal orientation. Faceted QDs with a truncated octahedral shape were prepared and deposited in a solvent on a pyramidal microhole array prepared on a Si (100) substrate. During the deposition, facets of neighboring QDs came into contact with each other in the aligned microholes. The three-dimensional crystal orientation alignment was confirmed bydoi:10.7567/apex.11.085601 fatcat:4fzvsp62gvef7nmmcpjeekb7bi