Stable perovskite solar cells using thiazolo [5, 4-d]thiazole-core containing hole transporting material. (July 2018)

• Record Type: Journal Article
• Authors: Ameen, Sadia; Akhtar, M. Shaheer; Nazim, M.; Nazeeruddin, Mohammad Khaja; Shin, Hyung-Shik
• Is Part Of: Nano energy. Volume 49(2018)
• Page Start: 372
• Page End: 379
• Publication Date: 2018-07
• Subjects: Small molecule -- Furan spacer -- Hole mobility -- Perovskite solar cells; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2018.04.016
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: This work explains the synthesis of an efficient organic hole transporting material based on 4, 4′-(5, 5′-(thiazolo[5, 4- d ]thiazole-2, 5-diyl)bis(furan-5, 2-diyl))bis(N, N-diphenylaniline) (TP-FTzF-TP) and the replacement of poly(3, 4-ethylenedio-xythiophene): poly(styrenesulfonate) (PEDOT:PSS) layer by simple O2 plasma treatment for perovskite solar cells (PSCs). The introduction of furan spacer groups significantly tuned the absorption and the electrochemical properties of the organic hole transporting material. The ITO(O2 plasma)/TP-FTzF-TP/CH3 NH3 PbI3 /PC61 BM/Au configuration based PSC exhibited a high power conversion efficiency (PCE) of ~ 16.4% which showed a momentous improvement as compared to PCEs of ~ 11.6% and ~ 10.5% achieved by ITO/PEDOT:PSS/TP-FTzF-TP/CH3 NH3 PbI3 /PC61 BM/Au and ITO/TP-FTzF-TP/CH3 NH3 PbI3 /PC61 BM/Au devices, respectively. The superior performances of PSC were accredited to fast hole injection from the valence band of CH3 NH3 PbI3 into the suitable HOMO and a high hole mobility of TP-FTzF-TP HTM. Graphical abstract: A furan-bridged hole transporting material (HTM) is synthesized and characterized by spectroscopic techniques. The highest occupied molecular orbitals of the HTM are found to be in proper alignment with the energy levels of perovskite material. The HTM in combination with the hybrid methylammonium lead triiodide (MAPbI3) perovskite in an inverted configuration consisting of ITO (O2 plasma)/TP-FTzF-TP/CH3NH3PbI3/PC61BM/Au, exhibit an excellent power conversion efficiency of ~ 16.4%. The short-circuit current density of ~ 21.94 mA/cm2, VOC of ~ 1.04 V and FF of ~ 0.72 under 1 sun condition.fx1 Highlights: A furan-bridged based HTM is synthesized and characterized by spectroscopic techniques. HOMO of HTM is found to be in proper alignment with the energy levels of perovskite material. An inverted configuration consisting of ITO (O2 plasma)/TP-FTzF-TP/CH3NH3PbI3/PC61BM/Au, exhibits an excellent PCE of ~ 16.4%. The short-circuit current density of ~ 21.94 mA/cm2, VOC of ~ 1.04 V and FF of ~ 0.72 under 1 sun condition.