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A novel phenoxazine-based hole transport material for efficient perovskite solar cell
KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
KTH, Skolan för kemivetenskap (CHE), Kemi, Tillämpad fysikalisk kemi.
KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
Vise andre og tillknytning
2015 (engelsk)Inngår i: Journal of Energy Challenges and Mechanics, ISSN 2095-4956, E-ISSN 2056-9386, Vol. 24, nr 6, s. 698-706Artikkel i tidsskrift (Fagfellevurdert) Published
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Text
Abstract [en]

Based on the previous research work in our laboratory, we have designed and synthesized a small-molecule, hole transport material (HTM) POZ6-2 using phenoxazine (POZ) as central unit and dicyanovinyl units as electron-withdrawing terminal groups. Through the introduction of a 2-ethyl-hexyl bulky chain into the POZ core unit, POZ6-2 exhibits good solubility in organic solvents. In addition, POZ6-2 possesses appropriate energy levels in combination with a high hole mobility and conductivity in its pristine form. Therefore, it can readily be used as a dopant-free HTM in perovskite solar cells (PSCs) and a conversion efficiency of 10.3% was obtained. The conductivity of the POZ6-2 layer can be markedly enhanced via doping in combination with typical additives, such as 4-tert-butylpyridine (TBP) and lithium bis(trifluoromethanesulfonyl) imide (LiTFSI). Correspondingly, the efficiency of the PSCs was further improved to 12.3% using doping strategies. Under the same conditions, reference devices based on the well-known HTM Spiro-OMeTAD show an efficiency of 12.8%.

sted, utgiver, år, opplag, sider
Elsevier, 2015. Vol. 24, nr 6, s. 698-706
Emneord [en]
Dopant-free, Perovskite solar cell, Hole transport material, Phenoxazine, Thin film
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-180515DOI: 10.1016/j.jechem.2015.10.021ISI: 000366542300005Scopus ID: 2-s2.0-84948682610OAI: oai:DiVA.org:kth-180515DiVA, id: diva2:894558
Merknad

QC 20160115

Tilgjengelig fra: 2016-01-15 Laget: 2016-01-14 Sist oppdatert: 2017-11-30bibliografisk kontrollert

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