Enhanced Multiple Exciton Generation in Quasi-One-Dimensional Semiconductors
Citations Over TimeTop 10% of 2011 papers
Abstract
The creation of a single electron-hole pair (i.e., exciton) per incident photon is a fundamental limitation for current optoelectronic devices including photodetectors and photovoltaic cells. The prospect of multiple exciton generation per incident photon is of great interest to fundamental science and the improvement of solar cell technology. Multiple exciton generation is known to occur in semiconductor nanostructures with increased efficiency and reduced threshold energy compared to their bulk counterparts. Here we report a significant enhancement of multiple exciton generation in PbSe quasi-one-dimensional semiconductors (nanorods) over zero-dimensional nanostructures (nanocrystals), characterized by a 2-fold increase in efficiency and reduction of the threshold energy to (2.23 ± 0.03)E(g), which approaches the theoretical limit of 2E(g). Photovoltaic cells based on PbSe nanorods are capable of improved power conversion efficiencies, in particular when operated in conjunction with solar concentrators.
Related Papers
- → Stability and Transformations of Heated Gold Nanorods(2011)30 cited
- → Single crystal TiO2 nanorods: Large-scale synthesis and field emission(2012)18 cited
- → Size-dependent water splitting activity of ZnO nanorods(2019)3 cited
- → Superfocusing effect in the chain of silver nanorods(2011)2 cited
- Solvothermal Synthesis of CdSxSe1-x Nanorods by Polymer Gel-Controlled Growth Strategy(2007)