All-perovskite tandem solar cells represent a significant advancement in next-generation photovoltaics toward higher power conversion efficiencies than single junction cells. A critical component of a monolithic tandem solar cell is the interconnecting layer, which facilitates the integration of the wide bandgap and low bandgap subcells. Conventional designs in all-perovskite tandem cells are based on an ultrathin metal recombination layer, typically Au, alongside a poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) hole transporting layer, which introduce optical and recombination losses, and instabilities. Here, we present a new interconnecting layer based on a graphene-oxide recombination layer, which facilitates the replacement of PEDOT:PSS with the preferred self-assembled monolayer [2-(9-carbazol-9-yl)ethyl]phosphonic acid (2PACz). This device architecture results in significantly reduced optical and nonradiative losses, leading to champion device efficiency of 23.4% compared to 19.7% with the conventional layers, along with improvements in stability. This work solves a critical challenge in all-perovskite tandem cell device design.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11834147 | PMC |
| http://dx.doi.org/10.1021/acsenergylett.4c03065 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Self-Induced A-B-A Structure Enables Efficient Wide-Bandgap Perovskite Solar Cells and Tandems.
Adv Sci (Weinh)
March 2025
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, P. R. China.
Wide-bandgap (WBG) perovskite solar cells (PSCs), due to their tunable bandgap, can be integrated into tandem cell configurations with narrow-bandgap solar cells to overcome the shockley-queisser (SQ) limitation. However, the main obstacles limiting their performance are poor crystallinity and light-induced halide segregation. To achieve high performance in WBG PSCs, this study reports a dual-molecule cooperative strategy involving the introduction of 1-benzyl-3-methylimidazolium bromide (BzMIM Br) as an additive and the introduction of 6-fluoropyrimidine-2,4- diamine (DMFP) as a passivation layer.
View Article and Find Full Text PDFUniversal in situ oxide-based ABX-structured seeds for templating halide perovskite growth in All-perovskite tandems.
Nat Commun
February 2025
Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, China.
Precise control over halide perovskite crystallization is pivotal for realizing efficient solar cells. Here, we introduce a strategy utilizing in-situ-formed oxide-based ABX-structured seeds to regulate perovskite crystallization and growth. Introducing potassium stannate into perovskite precursors triggers a spontaneous reaction with lead iodide, producing potassium iodide and lead stannate.
View Article and Find Full Text PDFOptimized Graphene-Oxide-Based Interconnecting Layer in All-Perovskite Tandem Solar Cells.
ACS Energy Lett
February 2025
Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, United Kingdom.
All-perovskite tandem solar cells represent a significant advancement in next-generation photovoltaics toward higher power conversion efficiencies than single junction cells. A critical component of a monolithic tandem solar cell is the interconnecting layer, which facilitates the integration of the wide bandgap and low bandgap subcells. Conventional designs in all-perovskite tandem cells are based on an ultrathin metal recombination layer, typically Au, alongside a poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) hole transporting layer, which introduce optical and recombination losses, and instabilities.
View Article and Find Full Text PDFSelf-Assembled Charge Bridge Path at the Sn-Pb Perovskite/C Interface for High-Efficiency All-Perovskite Tandem Solar Cells.
Small
January 2025
Key Laboratory of Flexible Electronics (KLoFE) & Institute of Advanced Materials (IAM), School of Flexible Electronics (Future Technologies), Nanjing Tech University (Nanjing Tech), Nanjing, 210009, China.
Narrow bandgap mixed tin-lead perovskite solar cells (PSCs) have garnered substantial research interest owing to their remarkable optoelectronic properties. However, non-radiative recombination and carrier transport losses at the interface between the perovskite layer and the charge transport layer (C) significantly reduce the overall efficiency of mixed tin-lead PSCs. To address this challenge, 9-Fluorenylmethyl carbazate (9FC) is incorporated at the interface between perovskite and C.
View Article and Find Full Text PDFStrengthening perovskite interfaces with in-situ polymerized self-assembled monolayers.
J Colloid Interface Sci
May 2025
College of Materials, Fujian Key Laboratory of Advanced Materials, Xiamen Key Laboratory of Electronic Ceramic Materials and Devices, Xiamen University, Xiamen 361005 China; Shenzhen Research Institute of Xiamen University, Shenzhen 518000 China. Electronic address:
Poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonate) (PEDOT:PSS) has been widely used as the hole transport layers (HTLs) for perovskite solar cells (PSCs), especially in all-perovskite tandems. However, the energy-level mismatch between PEDOT:PSS and perovskite leads to large voltage deficit in PSCs, and the dopant PSS with high acidity and hygroscopicity conspicuously deteriorates the device stability. Herein, a powerful strategy for constructing self-assembled polymer HTLs is developed by in-situ polymerization of functionalized 3,4-ethylenedioxythiophene with carboxylic acids as side groups.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!