Dopant engineering for spiro-ometad hole-transporting materials towards efficient perovskite solar cells
Yükleniyor...
Dosyalar
Tarih
2021
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
John Wiley and Sons Inc.
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
One of the most prominent hole-transporting material (HTM) for hybrid perovskite solar cells has been 2,2″,7,7″-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene (spiro-OMeTAD), which is commonly doped with metal bis(trifluoromethylsulfonyl)imide (M(TFSI)n) salts that contribute to generating the active radical cation HTM species. The underlying role of the metal cation, however, remains elusive. Here, the effect of metal cations (M = Li, Zn, Ca, Cu, and Sr) on doping spiro-OMeTAD is analyzed by a combination of techniques, including electron paramagnetic resonance spectroscopy and cyclic voltammetry, which is complemented by photovoltaic device and hole mobility analysis. As a result, the authors reveal the superiority of Zn(TFSI)2 salts in device performances as compared to the others, including redox-active Cu(TFSI)2. This analysis thereby unravels new design principles for dopant engineering in HTMs for hybrid perovskite photovoltaics.
Açıklama
WOS:000682446800001
Anahtar Kelimeler
Hole Mobility, Hole Transport Materials, M-TFSI N, P-Type Dopants, Photovoltaics
Kaynak
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
Sayı
Künye
Seo, J. -., Akın, S., Zalibera, M., Preciado, M. A. R., Kim, H. -., Zakeeruddin, S. M., . . . Grätzel, M. (2021). Dopant engineering for spiro-ometad hole-transporting materials towards efficient perovskite solar cells. Advanced Functional Materials, doi:10.1002/adfm.202102124
