%0 Journal Article %1 xing2017transcending %A Xing, Guichuan %A Wu, Bo %A Wu, Xiangyang %A Li, Mingjie %A Du, Bin %A Wei, Qi %A Guo, Jia %A Yeow, Edwin K. L. %A Sum, Tze Chien %A Huang, Wei %D 2017 %I Nature Publishing Group %J Nature Communications %K 3D perovskite recombination %P 14558 %R 10.1038/ncomms14558 %T Transcending the slow bimolecular recombination in lead-halide perovskites for electroluminescence %U /brokenurl#http:https://dx.doi.org/10.1038/ncomms14558 %V 8 %X The slow bimolecular recombination that drives three-dimensional lead-halide perovskites’ outstanding photovoltaic performance is conversely a fundamental limitation for electroluminescence. Under electroluminescence working conditions with typical charge densities lower than 1015 cm−3, defect-states trapping in three-dimensional perovskites competes effectively with the bimolecular radiative recombination. Herein, we overcome this limitation using van-der-Waals-coupled Ruddlesden-Popper perovskite multi-quantum-wells. Injected charge carriers are rapidly localized from adjacent thin few layer (n≤4) multi-quantum-wells to the thick (n≥5) multi-quantum-wells with extremely high efficiency (over 85%) through quantum coupling. Light emission originates from excitonic recombination in the thick multi-quantum-wells at much higher decay rate and efficiency than bimolecular recombination in three-dimensional perovskites. These multi-quantum-wells retain the simple solution processability and high charge carrier mobility of two-dimensional lead-halide perovskites. Importantly, these Ruddlesden-Popper perovskites offer new functionalities unavailable in single phase constituents, permitting the transcendence of the slow bimolecular recombination bottleneck in lead-halide perovskites for efficient electroluminescence.

@article{xing2017transcending, abstract = {The slow bimolecular recombination that drives three-dimensional lead-halide perovskites’ outstanding photovoltaic performance is conversely a fundamental limitation for electroluminescence. Under electroluminescence working conditions with typical charge densities lower than 1015 cm−3, defect-states trapping in three-dimensional perovskites competes effectively with the bimolecular radiative recombination. Herein, we overcome this limitation using van-der-Waals-coupled Ruddlesden-Popper perovskite multi-quantum-wells. Injected charge carriers are rapidly localized from adjacent thin few layer (n≤4) multi-quantum-wells to the thick (n≥5) multi-quantum-wells with extremely high efficiency (over 85%) through quantum coupling. Light emission originates from excitonic recombination in the thick multi-quantum-wells at much higher decay rate and efficiency than bimolecular recombination in three-dimensional perovskites. These multi-quantum-wells retain the simple solution processability and high charge carrier mobility of two-dimensional lead-halide perovskites. Importantly, these Ruddlesden-Popper perovskites offer new functionalities unavailable in single phase constituents, permitting the transcendence of the slow bimolecular recombination bottleneck in lead-halide perovskites for efficient electroluminescence.}, added-at = {2017-03-27T14:43:26.000+0200}, author = {Xing, Guichuan and Wu, Bo and Wu, Xiangyang and Li, Mingjie and Du, Bin and Wei, Qi and Guo, Jia and Yeow, Edwin K. L. and Sum, Tze Chien and Huang, Wei}, biburl = {https://www.bibsonomy.org/bibtex/2ccef3ac3567aaf1160f0b21896e0d2aa/bretschneider_m}, doi = {10.1038/ncomms14558}, interhash = {05cbeed868a8ddf70186de3f8817622c}, intrahash = {ccef3ac3567aaf1160f0b21896e0d2aa}, issn = {2041-1723}, journal = {Nature Communications}, keywords = {3D perovskite recombination}, month = {2}, pages = 14558, publisher = {Nature Publishing Group}, timestamp = {2017-03-27T14:43:26.000+0200}, title = {Transcending the slow bimolecular recombination in lead-halide perovskites for electroluminescence}, url = {/brokenurl#http:https://dx.doi.org/10.1038/ncomms14558}, volume = 8, year = 2017 }