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Questions related from Hasan Abbas
Nano-chalcogenide perovskites have shown outstanding opto-electrical properties. They have also depicted brilliant thermal as well as aqueous stability (against external moisture). However, these...
20 July 2021 7,859 2 View
MXenes could be deployed in the fabrication of perovskite solar cells as buffer layer, and electrode materials etc. In which way these materials will affect the overall performance of perovskite...
05 July 2021 8,757 5 View
Recently, some researchers have been reported that inverted p-i-n perovskite solar cells have shown instability under reverse bias. Probably, this instability is due to shunt formation. Could...
29 July 2020 3,041 0 View
Four terminal solar cells need at least three transparent electrical contacts and have shown better efficiency than that of two terminal solar cells. This is probably due to more charge carrier...
06 April 2020 1,801 5 View
Silver is low cost metal (in comparison to Gold) and have widely been used as top electrode material. In such solar cells, the silver reacts with absorber layer (Methyl Ammonium Lead Iodide) and...
16 March 2020 9,092 6 View
Recently, fluorinated compounds are widely used to reduce the moisture sensitivity of perovskite materials (resulting in enhanced stability). Yuhang Liu et al. and, Hiufen Xu et al. etc.used such...
16 January 2020 2,749 3 View
Last week we have fabricated perovskite solar cells having composition FTO/NiOx/CH3NH3PbI3-ZnO/ZnO/Ag. We got Voc = 0.25 V, Isc = 0.5 mA, FF = 62 % and efficiency around 1.4 %. Now question arises...
12 December 2019 8,292 3 View
Mixed perovskites (e.g. methyl ethyl ammonium halides etc.) have shown better stability than that of traditional perovskites such as methyl ammonium iodide etc. Due to their better stabilities,...
20 November 2019 9,816 0 View
Recently, a research team from NTHU has developed spray synthesis technology to produce perovskite quantum dots (PQDs) featuring nearly 100% quantum yield and high color purity and stability of...
19 June 2019 2,461 1 View
Goldschmidt tolerance factor is defined as t = (RA+ RX)/sqrt of 2 (RB+ RX) where RA is radius of cation A, RB is radius of cation B and RX is radius of anion. This tolerance factor is used to...
23 May 2019 811 2 View
Efficiency of PSCs can be enhanced by water rinsing of PEDOT:PSS and application of MoO3:PEDOT:PSS composite as HTL will stop etching of ITO. Now questions arise, what is the detailed...
22 May 2019 238 5 View
Ammonium meta tungastate hydrate (AMH) & NaCl etc can be used for doping into PEDOT:PSS to enhance stability of perovskite solar cells. What are the detailed methods of doping these materials...
14 May 2019 10,003 4 View
PEDOT:PSS is hygroscopic in nature and absorbs moisture from sorrounding environment. One more problem with PEDOT:PSS is it's acidic nature which affects ITO/HTL interface.These problems lead to...
11 May 2019 7,265 3 View
2D perovskites [(ZnPc)0.5 MAn-1PbnT3n+1 ] etc. are derived from organic spaces and have shown better stability due to hydrophobic nature of organic spaces. Question is that how these materials...
07 May 2019 10,015 1 View
Lead Sulfide (PbS), Cadmium Telluride (CdTe) and Cadmium selenide (CdSe) etc. are not safe for environment but still have widely been used in solar cells. So what are the reasons behind it? Why...
25 April 2019 5,462 3 View
Tin based perovskites have low toxicity and near ideal band gap; due to these properties, they can be used to fabricate lead free environment friendly photovoltaic cells. Only drawback with these...
09 April 2019 5,387 2 View
High band-gap materials used as ETLs in perovskites based solar cells seem to be more transparent than low band gap materials; what is the physics behind it?
29 March 2019 285 0 View
Perovskite based solar cells have three layers; electron transport layer, absorber material layer and hole transport layer. Recently a new approach of hole transport layer free perovskite solar...
31 December 2018 6,628 5 View
