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In photovoltaic (PV) applications, low-cost lead chalcogenide colloidal quantum dots (CQDs) have attracted a lot of interest.
Due to its rapid multiple-exciton production and large exciton Bohr radius, lead selenide (PbSe) CQDs in particular are regarded as desirable active absorbers in solar cells.
Their limited air stability and tendency to generate traps or flaws during film production, however, prevent them from developing further.
Cation exchange is used to first create air-stable PbSe CQDs, then solution-phase ligand exchange is used to create absorber films, and finally spin coating is used to create the films.
The Global PbSe Colloidal Quantum dots market accounted for $XX Billion in 2021 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
For the upcoming generation of optoelectronic devices, colloidal quantum dot-based three-dimensional superlattices are a promising candidate because they are anticipated to display a rare combination of tunable optical properties and coherent electrical transport through minibands.
While the majority of the earlier research was conducted on two-dimensional arrays, there hasn’t been much control over how these systems come into existence.
As a result, the potential of these metamaterials has so far been limited, leading to unimpressive transport properties due to limited long-range order and energetical disorder.
Here, they show that remarkable transport qualities can be achieved by carefully controlling the ordering of colloidal quantum dots at the nanoscale level over wide areas and in three dimensions.
This ultimately demonstrates that optoelectronic metamaterials with highly tunable optical properties and charge mobilities approaching the one of bulk semiconductor can be obtained. This discovery opens the door for a brand-new class of optoelectronic gadgets.
