Coupling Ferroelectric to colloidal Nanocrystals as a Generic Strategy to Engineer the Carrier Density Landscape

• DOI: 10.1002/adfm.202300846
• Publication Date: 2023-05-15T03:36:17Z
• Authors: Mariarosa Cavallo; Erwan Bossavit; Sylvia Matzen; Thomas Maroutian; Rodolphe Alchaar; Tung Huu Dang; Adrien Khalili; Corentin Dabard; Huichen Zhang; Yoann Prado; Claire Abadie; James K Utterback; Jean Francois Dayen; Mathieu G. Silly; Pavel Dudin; Jose Avila; Emmanuel Lhuillier; Debora Pierucci
• Keywords: Photodiode

Abstract The design of infrared nanocrystals‐based (NCs) photodiodes faces a major challenge related to the identification barriers with well‐suited band alignment or strategy finely control carrier density. Here, this study explores general complementary approach where density is achieved by coupling an NC layer ferroelectric material. up‐and‐down change in polarization directly impacts electronic structure, resulting formation lateral pn junction. This effect uncovered using nano X‐ray photoemission spectroscopy, which shows relative energy shift 115 meV signal over two different up‐ and down‐polarized regions, as large open circuit value obtained diode stack. performance junction reveals enhanced responsivity reduced noise that lead factor 40 increase detectivity value.