Effect of tantalum doping in a TiO₂ compact layer on the performance of planar spiro-OMeTAD free perovskite solar cells

Abstract

This work investigates the effect of tantalum doping in compact TiO2 layer on the performance of planar spiro-OMeTAD free perovskite solar cells. 40% improvement in the overall efficiency was obtained as compared to the device with undoped TiO2.

High efficiency planar-type perovskite solar cells with negligible hysteresis using EDTA-complexed SnO2

“…In order to overcome this issue, planar-type PSC comprising of stacked planar thin films has been developed 18 , 19 using low-temperature and low-cost synthesis processes 20 – 22 since the long charge diffusion length and bipolar carrier properties of perovskites 23 , 24 . However, compared to the mesoporous-type PSC, its planar-type counterpart suffers from significant lower certified PCE 18 , 25 .…”

Highly crystalline Nb-doped TiO2 nanospindles as superior electron transporting materials for high-performance planar structured perovskite solar cells

“…For instance, by using yttrium 17 doped TiO 2 as compact layer, the charge extraction process was improved and the planar PSC device achieved a high PCE of 19.3%. Up to now, magnesium, 18 lithium or sodium, [19][20][21][22] samarium, 23 lanthanum, 24 tantalum, 25 uorine, 26 thallium, 27 and other metal [28][29][30] doped TiO 2 have been attempted in perovskite solar cells. Niobium-doped TiO 2 (Nb:TiO 2 ) has been tremendous used in transparent conductive oxides (TCOs), 31 photocatalysis, 32,33 lithium and sodium ion batteries, 34,35 dyesensitized solar cells (DSSCs).…”

Recent advancements in compact layer development for perovskite solar cells

“…Ranjan et al. [148] reported tantalum (Ta) doping of TiO 2 CL in the structure of FTO/Ta-TiO 2 /CH 3 NH 3 PbI 3 /P3HT/Ag with introducing poly-3-hexylthiophene (P3HT) as inexpensive and stable HTLs instead of expensive Spiro-OMeTAD. Tantalum (Ta) is a good element for doping in TiO 2 .…”