Change search
ReferencesLink to record
Permanent link

Direct link
Enhanced Photocurrent Density by Spin-Coated NiO Photocathodes for N-Annulated Perylene-Based p-Type Dye-Sensitized Solar Cells
Show others and affiliations
2016 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 8, no 30, 19393-19401 p.Article in journal (Refereed) Published
Abstract [en]

The low photocurrent density of p-type dye sensitized solar cells (p-DSSCs) has limited the development of high-efficiency tandem cells due to the inadequate light harvesting ability of sensitizers and the low hole mobility of semiconductors. Hereby, two new "push-pull" type organic dyes (PQ-1 and PQ-2) containing N-annulated perylene as electron donor have been synthesized, where the PQ-2-based p-DSSCs show higher photoelectric conversion efficiency (PCE) of 0.316% owing to the higher molar extinction compared to of that PQ-1. Additionally, the photocurrent densities were remarkably increased from 2.20 to 5.85 mA cm(-2) for PQ-1 and 2.45 to 6.69 mA cm(-2) for PQ-2 by spin coated NiO photocathode based-p-DSSCs, respectively. This results are ascribed to the enhancement of hole transport rate, dye loading amounts and transparency of NiO films in comparison to that prepared by screen-printing method. Electrochemical impedance spectroscopy and theoretical calculations studies indicate that the molecular dipole moment approaching closer to the NiO surface shifts the quasi-Fermi level to more positive levels, improving,open-circuit voltage (V-oc). Intensity-modulated photocurrent spectroscopy illustrates that the hole transit time in NiO films prepared in spin-coating is shorter than that prepared by screen-printing method.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2016. Vol. 8, no 30, 19393-19401 p.
Keyword [en]
p-type dye-sensitized solar cells, spin-coated NiO photocathode, N-annulated perylene, quinoxaline, organic sensitizer
National Category
Chemical Sciences
URN: urn:nbn:se:kth:diva-193218DOI: 10.1021/acsami.6b04007ISI: 000380968300025PubMedID: 27416960ScopusID: 2-s2.0-84982686556OAI: diva2:1034498

QCV 20161012

Available from: 2016-10-12 Created: 2016-09-30 Last updated: 2016-10-12Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMedScopus

Search in DiVA

By author/editor
Li, XinAgren, Hans
By organisation
Theoretical Chemistry and Biology
In the same journal
ACS Applied Materials and Interfaces
Chemical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

ReferencesLink to record
Permanent link

Direct link