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Dependence of ITO‐Coated Flexible Substrates in the Performance and Bending Durability of Perovskite Solar Cells
Author(s) -
Pandey Manish,
Wang Zhen,
Kapil Gaurav,
Baranwal Ajay K.,
Hirotani Daisuke,
Hamada Kengo,
Hayase Shuzi
Publication year - 2019
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201900288
Subject(s) - materials science , sheet resistance , polyethylene naphthalate , indium tin oxide , polyethylene terephthalate , energy conversion efficiency , substrate (aquarium) , transmittance , composite material , bending , optoelectronics , durability , layer (electronics) , oceanography , geology
Flexible perovskite solar cells (PSCs) is being reported on different kinds of indium tin oxide (ITO)‐coated flexible substrates such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN) with varying sheet resistance. High sheet resistance and low transmittance of these substrates in comparison to glass‐ITO based rigid substrate are among the major issues in achieving high power conversion efficiency (PCE), especially with large active area due to considerably low fill factor (FF) values. With a small active cell area of 0.1 cm 2 , it is found that sheet resistance of these substrates do not play a dominant role and the short circuit current density ( J SC ) depends on the transmittance of these conducting flexible substrates producing average PCE of 12.1% with PEN‐ITO (12 Ω/□) and 11.74% for PET‐ITO (49 Ω/□). When the active cell area is increased to 1 cm 2 , sheet resistance seems to play a major role to maintain J SC as well as FF of the flexible PSCs giving PCE of ∼10% with PEN‐ITO (12 Ω/□) in comparison to 3.4% for PET‐ITO (49 Ω/□). In contrast to PCE results, bending durability test for 1000 cycles showed that the flexible substrates with highest sheet resistance can retain maximum PCE.