%0 Journal Article %1 noauthororeditor %A Ziegler, Jonas D. %A Cho, Yeongsu %A Terres, Sophia %A Menahem, Matan %A Taniguchi, Takashi %A Watanabe, Kenji %A Yaffe, Omer %A Berkelbach, Timothy C. %A Chernikov, Alexey %D 2023 %J Adv. Mater. %K c %N 18 %P 2210221 %R https://doi.org/10.1002/adma.202210221 %T Mobile trions in electrically tunable 2D hybrid perovskites %U https://onlinelibrary.wiley.com/doi/10.1002/adma.202210221 %V 35 %X 2D hybrid perovskites are currently in the spotlight of material research for light-harvesting and -emitting applications. It remains extremely challenging, however, to externally control their optical response due to the difficulties of introducing electrical doping. Here, an approach of interfacing ultrathin sheets of perovskites with few-layer graphene and hexagonal boron nitride into gate-tunable, hybrid heterostructures, is demonstrated. It allows for bipolar, continuous tuning of light emission and absorption in 2D perovskites by electrically injecting carriers to densities as high as 1012 cm−2. This reveals the emergence of both negatively and positively charged excitons, or trions, with binding energies up to 46 meV, among the highest measured for 2D systems. Trions are shown to dominate light emission and propagate with mobilities reaching 200 cm2 V−1 s−1 at elevated temperatures. The findings introduce the physics of interacting mixtures of optical and electrical excitations to the broad family of 2D inorganic–organic nanostructures. The presented strategy to electrically control the optical response of 2D perovskites highlights it as a promising material platform toward electrically modulated light-emitters, externally guided charged exciton currents, and exciton transistors based on layered, hybrid semiconductors.

@article{noauthororeditor, abstract = {2D hybrid perovskites are currently in the spotlight of material research for light-harvesting and -emitting applications. It remains extremely challenging, however, to externally control their optical response due to the difficulties of introducing electrical doping. Here, an approach of interfacing ultrathin sheets of perovskites with few-layer graphene and hexagonal boron nitride into gate-tunable, hybrid heterostructures, is demonstrated. It allows for bipolar, continuous tuning of light emission and absorption in 2D perovskites by electrically injecting carriers to densities as high as 1012 cm−2. This reveals the emergence of both negatively and positively charged excitons, or trions, with binding energies up to 46 meV, among the highest measured for 2D systems. Trions are shown to dominate light emission and propagate with mobilities reaching 200 cm2 V−1 s−1 at elevated temperatures. The findings introduce the physics of interacting mixtures of optical and electrical excitations to the broad family of 2D inorganic–organic nanostructures. The presented strategy to electrically control the optical response of 2D perovskites highlights it as a promising material platform toward electrically modulated light-emitters, externally guided charged exciton currents, and exciton transistors based on layered, hybrid semiconductors.}, added-at = {2023-03-23T08:14:41.000+0100}, author = {Ziegler, Jonas D. and Cho, Yeongsu and Terres, Sophia and Menahem, Matan and Taniguchi, Takashi and Watanabe, Kenji and Yaffe, Omer and Berkelbach, Timothy C. and Chernikov, Alexey}, biburl = {https://www.bibsonomy.org/bibtex/29ff343b23a94f1a16230174c2d7d5518/ctqmat}, day = 22, description = {Mobile Trions in Electrically Tunable 2D Hybrid Perovskites - Ziegler - Advanced Materials - Wiley Online Library}, doi = {https://doi.org/10.1002/adma.202210221}, interhash = {e584f4b75200a0d8f49b85361fb6965c}, intrahash = {9ff343b23a94f1a16230174c2d7d5518}, journal = {Adv. Mater.}, keywords = {c}, month = {02}, number = 18, pages = 2210221, timestamp = {2023-10-17T08:50:25.000+0200}, title = {Mobile trions in electrically tunable 2D hybrid perovskites}, url = {https://onlinelibrary.wiley.com/doi/10.1002/adma.202210221}, volume = 35, year = 2023 }