Diammonium spacer-induced stable zigzag type 2D Dion-Jacobson lead/tin-based perovskite solar cells

Hybrid halide two dimensional (2D) perovskites have attracted considerable attention because they exhibit an improvement in perovskite solar cells compared with their 3D analogs. However, their bulky organic space group, leading to higher bandgaps and exciton binding energy, limits the charge transp...

Full description

Saved in:
Bibliographic Details
Published in:Dalton transactions : an international journal of inorganic chemistry 2023-11, Vol.52 (46), p.17258-17272
Main Author: Jung, Mi-Hee
Format: Article
Language:English
Subjects:
Carrier transport
Charge transport
Energy conversion efficiency
Energy gap
Excitons
Open circuit voltage
Perovskites
Photovoltaic cells
Pinholes
Short circuit currents
Solar cells
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Hybrid halide two dimensional (2D) perovskites have attracted considerable attention because they exhibit an improvement in perovskite solar cells compared with their 3D analogs. However, their bulky organic space group, leading to higher bandgaps and exciton binding energy, limits the charge transport in solar cells. Herein, the 3-(aminomethyl)pyridinium (3API 2 , C 6 H 10 N 2 I 2 ) dication is incorporated into FA(Pb 0.5 Sn 0.5 )I 3 to develop zigzag type 2D Dion-Jacobson-phase perovskites, which have low band gaps in the range of 1.44 to 1.53 eV for concentrations from 5 mol% to 20 mol% due to structural distortion. The introduction of the 3API 2 cation increases the carrier conductivity and produces a high-quality perovskite film with no pinhole and connected grains, which is favorable for efficient carrier transport. Consequently, solar cells employing FA(Pb 0.5 Sn 0.5 )I 3 with 10 mol% 3API 2 added as a light absorber achieve a power conversion efficiency of 5.46% with an open-circuit voltage of 0.47 V, a fill factor of 58.07% and a short-circuit current density of 20.18 mA cm −2 . With this class of new 2D Dion-Jacobson perovskite compositions, this work suggests potential future directions for improving the performance and device stability of perovskite solar cells. We developed 2D DJ Pb/Sn-based perovskite by using the 3-(aminomethyl)pyridinium (3API 2 ) dication. The incorporation of 3AP iodide into 3D FAPb 0.5 Sn 0.5 I 3 perovskite leads to connected crystal grains and efficient carrier transport.
ISSN:1477-9226
1477-9234
DOI:10.1039/d3dt02041j