Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/138116
Title: Designing efficient energy funneling kinetics in ruddlesden-popper perovskites for high-performance light-emitting diodes
Authors: Yantara, Natalia
Bruno, Annalisa
Iqbal, Azhar
Nur Fadilah Jamaludin
Soci, Cesare
Mhaisalkar, Subodh
Mathews, Nripan
Keywords: Engineering::Materials::Energy materials
Issue Date: 2018
Source: Yantara, N., Bruno, A., Iqbal, A., Nur Fadilah Jamaludin, Soci, C., Mhaisalkar, S., & Mathews, N. (2018). Designing efficient energy funneling kinetics in ruddlesden-popper perovskites for high-performance light-emitting diodes. Advanced Materials, 30(33), 1800818-. doi:10.1002/adma.201800818
Journal: Advanced Materials
Abstract: Mixed Ruddlesden-Popper (RP) perovskites are of great interest in light-emitting diodes (LEDs), due to the efficient energy transfer (funneling) from high-bandgap (donor) domains to low-bandgap (acceptor) domains, which leads to enhanced photoluminescence (PL) intensity, long PL lifetime, and high-efficiency LEDs. However, the influence of reduced effective emitter centers in the active emissive film, as well as the implications of electrical injection into the larger bandgap donor material, have not been addressed in the context of an active device. The electrical and optical signatures of the energy cascading mechanisms are critically assessed and modulated in a model RP perovskite series ((C8 H17 NH3 )2 (CH(NH2 )2 )m-1 Pbm Br3m+1 ). Optimized devices demonstrate a current efficiency of 22.9 cd A-1 and 5% external quantum efficiency, more than five times higher than systems where funneling is absent. The signature of nonideal funneling in RP perovskites is revealed by the appearance of donor electroluminescence from the device, followed by a reduction in the LED performance.
URI: https://hdl.handle.net/10356/138116
ISSN: 0935-9648
DOI: 10.1002/adma.201800818
Rights: This is the peer reviewed version of the following article: Yantara, N., Bruno, A., Iqbal, A., Nur Fadilah Jamaludin, Soci, C., Mhaisalkar, S., & Mathews, N. (2018). Designing efficient energy funneling kinetics in ruddlesden-popper perovskites for high-performance light-emitting diodes. Advanced Materials, 30(33), 1800818-, which has been published in final form at http://doi.org/10.1002/adma.201800818. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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