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Strategic design of self-generated Ni-N-C hybrid sites in 3D network structures as counter electrodes in photovoltaics
- Source :
- Resources Chemicals and Materials, Vol 2, Iss 1, Pp 1-10 (2023)
- Publication Year :
- 2023
- Publisher :
- KeAi Communications Co., Ltd., 2023.
-
Abstract
- The technical bottleneck of carbon materials as counter electrodes (CEs) lies in their limited electrical conductivity, extended ion diffusion paths, poor dispersion, and high contact resistance. Problem-oriented in-situ self-grown N-doped CNTs-coated Ni nanoparticles based on N-doped carbonaceous structures derived from pitaya peel (PC) are adopted to construct Ni-N-C hybrid 3D ionized network sites (Ni@NCNTs/PC-4) as CEs. Structural characterization, micromorphological and chemical composition analyses revealed the 3D network structure of Ni@NCNTs/PC-4 with abundant active sites. They effectively shorten the diffusion distance of I3− ions with a smaller charge transfer resistance (5.21 Ω) than that of PC (12.53 Ω). DSSCs based on Ni@NCNTs/PC-4 display good optoelectronic properties, in which the short-circuit current density (Jsc) is 13.27 mA/cm2, higher than those of Pt (11.66 mA/cm2) and PC (6.99 mA/cm2). The PCE value (5.13%) of DSSCs based on Ni@NCNTs/PC-4 is also higher than that of DSSCs based on PC (2.47%). Overall, this work provides a preliminary research and new ideas for further in-depth study of biomass-derived 3D structured-carbons that contribute to key electrodes in DSSCs.
Details
- Language :
- English
- ISSN :
- 27724433
- Volume :
- 2
- Issue :
- 1
- Database :
- Directory of Open Access Journals
- Journal :
- Resources Chemicals and Materials
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.53aa4ad91ab7450182df928b4d00568c
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.recm.2022.11.001