Tailoring the Energy Manifold of Quasi‐Two‐Dimensional Perovskites for Efficient Carrier Extraction
Source abstract
Abstract
Abstract Harvesting the excess energy from absorbed above bandgap photons is a promising approach to overcome the detailed balance limit for higher solar cell efficiencies. However, this remains very challenging for 2D layered halide perovskites as the fast excess energy loss competes effectively with charge extraction. Herein, the authors engineer the energy cascade manifold of quantum well (QW) states in quasi‐2D Ruddlesden–Popper perovskites by facile tuning of the organic spacer to decelerate the energy loss. The resulting excess energy loss rate is up to two orders slower compared to 3D perovskites, thus enabling efficient carrier extraction. 2D electronic spectroscopy reveals further insights into the structural and energetic disorder of these layered systems. Importantly, a judicious choice of the organic spacer holds the key to tailoring the coherent coupling between QWs that strongly influences the competition between the energy cascade and charge extraction.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Perovskite Materials and Applications · 2D Materials and Applications · Quantum Dots Synthesis And Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
Energy Research Institute @NTU (ERI@N) Interdisciplinary Graduate Programme Nanyang Technological University 50 Nanyang Avenue S2‐B3a‐01 Singapore 639798 Singapore
Department of Chemical Sciences University of Padova via Marzolo 1 Padua 35131 Italy
Padua Quantum Technologies Research Center Padova 9308 Italy
Energy Research Institute @ NTU (ERI@N) Nanyang Technological University 50 Nanyang Drive Singapore 637553 Singapore
School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore
Funding
Nanyang Technological University · Ministry of Education
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