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Tattoo‐Like Transferable Hole Selective Electrodes for Highly Efficient, Solution‐Processed Organic Indoor Photovoltaics
Author(s) -
Piva Nicola,
Greco Francesco,
Garbugli Michele,
Iacchetti Antonio,
Mattoli Virgilio,
Caironi Mario
Publication year - 2018
Publication title -
advanced electronic materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.25
H-Index - 56
ISSN - 2199-160X
DOI - 10.1002/aelm.201700325
Subject(s) - materials science , pedot:pss , polystyrene sulfonate , organic solar cell , electrode , photovoltaics , optoelectronics , fabrication , layer (electronics) , energy conversion efficiency , polystyrene , photoactive layer , photovoltaic system , nanotechnology , polymer , polymer solar cell , composite material , electrical engineering , medicine , chemistry , alternative medicine , engineering , pathology
In solution‐processed organic photovoltaics the deposition of charge selective interlayers or electrodes on top of the photoactive layer is a well‐known critical step, typically involving either surface treatments or addition of surfactants. As a general strategy to overcome such processing issues, here a simple and scalable tattoo‐based technique is presented for the direct transfer of selective poly(3,4‐ethylenedioxythiophene)/polystyrene‐sulfonate (PEDOT:PSS) contacts, previously screen printed on commercial temporary tattoo paper, on top of poly(3‐hexylthiophene):[6,6]‐phenyl‐C61‐butyric acid methyl ester (P3HT:PCBM) films. The obtained structure works both in sunlight and in artificial low‐light indoor conditions. In the latter case, which represents a very interesting application scenario for cost‐effective flexible and lightweight photovoltaic chargers, excellent photo‐conversion performances, in excess of 7.0 %, are achieved, the best performance reported so far for artificial light conversion with OPV based on the well‐known P3HT and PCBM blend. As a proof‐of‐concept toward real applications, this electrode transfer strategy is adopted to fabricate a 6 cm 2 mini‐module that in indoor low‐light conditions can power a temperature‐humidity sensor endowed with an LCD display. These results show that tattoo‐like transfer of charge selective electrodes is a promising strategy to simplify the fabrication process flow of organic photovoltaics tailored for low light conditions.