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Incorporation of Counter Ions in Organic Molecules: New Strategy in Developing Dopant-Free Hole Transport Materials for Efficient Mixed-Ion Perovskite Solar Cells
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för kemi - Ångström, Fysikalisk kemi.
KTH Royal Inst Technol, Sch Chem Sci & Engn, Dept Chem, Organ Chem,Ctr Mol Devices, SE-10044 Stockholm, Sweden..
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Nanoteknologi och funktionella material.
CSIC, Catalan Inst Nanosci & Nanotechnol ICN2, Campus UAB, Barcelona 08193, Spain.;Barcelona Inst Sci & Technol, Campus UAB, Barcelona 08193, Spain..
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2017 (engelsk)Inngår i: ADVANCED ENERGY MATERIALS, ISSN 1614-6832, Vol. 7, nr 14, artikkel-id 1602736Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Hole transport matertial (HTM) as charge selective layer in perovskite solar cells (PSCs) plays an important role in achieving high power conversion efficiency (PCE). It is known that the dopants and additives are necessary in the HTM in order to improve the hole conductivity of the HTM as well as to obtain high efficiency in PSCs, but the additives can potentially induce device instability and poor device reproducibility. In this work a new strategy to design dopant-free HTMs has been presented by modifying the HTM to include charged moieties which are accompanied with counter ions. The device based on this ionic HTM X44 dos not need any additional doping and the device shows an impressive PCE of 16.2%. Detailed characterization suggests that the incorporated counter ions in X44 can significantly affect the hole conductivity and the homogeneity of the formed HTM thin film. The superior photovoltaic performance for X44 is attributed to both efficient hole transport and effective interfacial hole transfer in the solar cell device. This work provides important insights as regards the future design of new and efficient dopant free HTMs for photovotaics or other optoelectronic applications.

sted, utgiver, år, opplag, sider
WILEY-V C H VERLAG GMBH , 2017. Vol. 7, nr 14, artikkel-id 1602736
HSV kategori
Forskningsprogram
Teknisk fysik med inriktning mot nanoteknologi och funktionella material
Identifikatorer
URN: urn:nbn:se:uu:diva-332853DOI: 10.1002/aenm.201602736ISI: 000405839400018OAI: oai:DiVA.org:uu-332853DiVA, id: diva2:1155634
Forskningsfinansiär
Swedish Energy AgencyÅForsk (Ångpanneföreningen's Foundation for Research and Development)Swedish Research CouncilSwedish Research Council FormasTilgjengelig fra: 2017-11-08 Laget: 2017-11-08 Sist oppdatert: 2017-12-14bibliografisk kontrollert

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