Core–shell heterostructured metal oxide arrays enable superior light-harvesting and hysteresis-free mesoscopic perovskite solar cells

Handle URI:
http://hdl.handle.net/10754/594271
Title:
Core–shell heterostructured metal oxide arrays enable superior light-harvesting and hysteresis-free mesoscopic perovskite solar cells
Authors:
Mahmood, Khalid ( 0000-0003-2354-3908 ) ; Swain, Bhabani Sankar; Amassian, Aram ( 0000-0002-5734-1194 )
Abstract:
To achieve highly efficient mesoscopic perovskite solar cells (PSCs), the structure and properties of an electron transport layer (ETL) or material (ETM) have been shown to be of supreme importance. Particularly, the core-shell heterostructured mesoscopic ETM architecture has been recognized as a successful electrode design, because of its large internal surface area, superior light-harvesting efficiency and its ability to achieve fast charge transport. Here we report the successful fabrication of a hysteresis-free, 15.3% efficient PSC using vertically aligned ZnO nanorod/TiO2 shell (ZNR/TS) core-shell heterostructured ETMs for the first time. We have also added a conjugated polyelectrolyte polymer into the growth solution to promote the growth of high aspect ratio (AR) ZNRs and substantially improve the infiltration of the perovskite light absorber into the ETM. The PSCs based on the as-synthesized core-shell ZnO/TiO2 heterostructured ETMs exhibited excellent performance enhancement credited to the superior light harvesting capability, larger surface area, prolonged charge-transport pathways and lower recombination rate. The unique ETM design together with minimal hysteresis introduces core-shell ZnO/TiO2 heterostructures as a promising mesoscopic electrode approach for the fabrication of efficient PSCs. This journal is © The Royal Society of Chemistry.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Solar and Photovoltaic Engineering Research Center (SPERC)
Citation:
Mahmood K, Swain BS, Amassian A (2015) Core–shell heterostructured metal oxide arrays enable superior light-harvesting and hysteresis-free mesoscopic perovskite solar cells. Nanoscale 7: 12812–12819. Available: http://dx.doi.org/10.1039/c5nr02874d.
Publisher:
Royal Society of Chemistry (RSC)
Journal:
Nanoscale
Issue Date:
2015
DOI:
10.1039/c5nr02874d
PubMed ID:
26159238
Type:
Article
ISSN:
2040-3364; 2040-3372
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Solar and Photovoltaic Engineering Research Center (SPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorMahmood, Khaliden
dc.contributor.authorSwain, Bhabani Sankaren
dc.contributor.authorAmassian, Aramen
dc.date.accessioned2016-01-19T14:44:51Zen
dc.date.available2016-01-19T14:44:51Zen
dc.date.issued2015en
dc.identifier.citationMahmood K, Swain BS, Amassian A (2015) Core–shell heterostructured metal oxide arrays enable superior light-harvesting and hysteresis-free mesoscopic perovskite solar cells. Nanoscale 7: 12812–12819. Available: http://dx.doi.org/10.1039/c5nr02874d.en
dc.identifier.issn2040-3364en
dc.identifier.issn2040-3372en
dc.identifier.pmid26159238en
dc.identifier.doi10.1039/c5nr02874den
dc.identifier.urihttp://hdl.handle.net/10754/594271en
dc.description.abstractTo achieve highly efficient mesoscopic perovskite solar cells (PSCs), the structure and properties of an electron transport layer (ETL) or material (ETM) have been shown to be of supreme importance. Particularly, the core-shell heterostructured mesoscopic ETM architecture has been recognized as a successful electrode design, because of its large internal surface area, superior light-harvesting efficiency and its ability to achieve fast charge transport. Here we report the successful fabrication of a hysteresis-free, 15.3% efficient PSC using vertically aligned ZnO nanorod/TiO2 shell (ZNR/TS) core-shell heterostructured ETMs for the first time. We have also added a conjugated polyelectrolyte polymer into the growth solution to promote the growth of high aspect ratio (AR) ZNRs and substantially improve the infiltration of the perovskite light absorber into the ETM. The PSCs based on the as-synthesized core-shell ZnO/TiO2 heterostructured ETMs exhibited excellent performance enhancement credited to the superior light harvesting capability, larger surface area, prolonged charge-transport pathways and lower recombination rate. The unique ETM design together with minimal hysteresis introduces core-shell ZnO/TiO2 heterostructures as a promising mesoscopic electrode approach for the fabrication of efficient PSCs. This journal is © The Royal Society of Chemistry.en
dc.publisherRoyal Society of Chemistry (RSC)en
dc.titleCore–shell heterostructured metal oxide arrays enable superior light-harvesting and hysteresis-free mesoscopic perovskite solar cellsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentSolar and Photovoltaic Engineering Research Center (SPERC)en
dc.identifier.journalNanoscaleen
dc.contributor.institutionSchool of Advanced Materials Engineering, Kookmin UniversitySeoul, South Koreaen
kaust.authorMahmood, Khaliden
kaust.authorAmassian, Aramen

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