Anisotropic Photoconductivity and Long-Lived Charge Carriers in Bismuth-Based One-Dimensional Perovskite with Type-IIa Band Alignment
- 30 July 2020
- journal article
- research article
- Published by American Chemical Society (ACS) in The Journal of Physical Chemistry Letters
- Vol. 11 (16), 6757-6762
- https://doi.org/10.1021/acs.jpclett.0c01772
Abstract
Bismuth-based perovskites are attracting intense scientific interest due to low toxicity and excellent moisture stability compared to lead-based analogues. However, high exciton binding energy, poor charge carrier separation, and transport efficiencies lower their optoelectronic performances. To address these issues, we have integrated an electronically active organic cation, naphthalimide ethylammonium, between the [BiI52-]n chains via crystal engineering to form a novel perovskite-like material (naphthalimide ethylammonium)2BiI5 (NBI). Single crystal analysis revealed a one-dimensional quantum-well structure for NBI in which inter-inorganic well electronic coupling is screened by organic layers. It exhibited anisotropic photoconductivity and long-lived charge carriers with milliseconds lifetime, which is higher than that of CH3NH3PbI3. Density functional theory calculations confirmed type-IIa band alignment between organic cations and inorganic chains, making the former electronically contribute to the overall charge transport properties of the material.This publication has 44 references indexed in Scilit:
- Beyond methylammonium lead iodide: prospects for the emergent field of ns2containing solar absorbersChemical Communications, 2016
- Optoelectronic and photovoltaic properties of the air-stable organohalide semiconductor (CH3NH3)3Bi2I9Journal of Materials Chemistry A, 2016
- Charge Carrier Lifetimes Exceeding 15 μs in Methylammonium Lead Iodide Single CrystalsThe Journal of Physical Chemistry Letters, 2016
- Low-temperature-processed efficient semi-transparent planar perovskite solar cells for bifacial and tandem applicationsNature Communications, 2015
- Crystal and Electronic Structures of Complex Bismuth Iodides A3Bi2I9 (A = K, Rb, Cs) Related to Perovskite: Aiding the Rational Design of PhotovoltaicsChemistry of Materials, 2015
- High damage tolerance of electrochemically lithiated siliconNature Communications, 2015
- Improved Understanding of the Electronic and Energetic Landscapes of Perovskite Solar Cells: High Local Charge Carrier Mobility, Reduced Recombination, and Extremely Shallow TrapsJournal of the American Chemical Society, 2014
- New Organic Semiconductors with Imide/Amide‐Containing Molecular SystemsAdvanced Materials, 2014
- Mercury: visualization and analysis of crystal structuresJournal of Applied Crystallography, 2006
- Optical Absorption in Band-Edge Region of (CH3NH3)3Bi2I9Single CrystalsJournal of the Physics Society Japan, 1996