Publication date: 15th December 2025
Herein, we propose a new strategy that uses kinetic energy to facilitate charge multiplication in high-detectivity CQD-based IRPDs. Accelerated by strong electric fields within the CQD layer, electrons gain kinetic energy and subsequently transfer this excess energy to neighboring valence electrons through electron–electron collisions, thereby generating multiple charge carriers within the CQD layer. In CQD-based IRPDs with a 585 nm-thick CQD layer, we observed a positive temperature-dependent breakdown voltage behavior, suggesting the occurrence of kinetically pumped charge multiplication. Our multi-physics models support the hypothesis that the primary mechanism of current generation shifts from electron tunneling to impact ionization in CQD-based IRPDs when the CQD layer thickness exceeds 540 nm. Further evidence from density functional theory (DFT) calculations and operando photoluminescence (PL) measurements revealed that an increase in dDtoD, modulated by the ligand chain length, lowers the threshold energy required for charge multiplication. However, this increase in dDtoD simultaneously impedes electron hopping in CQD-based IRPDs. Consequently, we engineered a charge-multipliable CQD-based IRPD that exhibits a maximum gain of 85, a specific detectivity of 1.4×1014 Jones, and a bandwidth of 1.1×106 Hz at a wavelength of 940 nm, outperforming the emerging solution-processable IRPDs [1].
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.