AI Article Synopsis
- The study introduces a new electron transporting layer (ETL) made from water-soluble carbon dots (CDs), enhancing charge carrier extraction in organic solar cells (OSCs).
- The CDs are synthesized using a simple one-step hydrothermal reaction between polyethylenimine (PEI) and PTCDA, leveraging their properties for better electron mobility and work function reduction.
- As a result, inverted OSCs featuring the new CDs achieved a power conversion efficiency (PCE) of 17.35% with impressive stability over 4000 hours, marking a promising development for efficient ETL materials in photovoltaic applications.
Article Abstract
The development of new electron transporting layer (ETL) materials to improve the charge carrier extraction and collection ability between cathode and the active layer has been demonstrated to be an effective approach to enhance the photovoltaic performance of organic solar cells (OSCs). Herein, water-soluble carbon dots (CDs) as ETL material have been creatively synthesized by a vigorous chemical reaction between polyethylenimine (PEI) and 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA) via a simple one-step hydrothermal method. Taking full advantage of the high electron transfer property of PTCDA and the work function () reduction ability of PEI, CD gained high electron mobility due to its large π-conjugated area and reduced the of indium tin oxide (ITO) by 0.75 eV. As for the photovoltaic performance of devices, inverted OSCs based on CDs have achieved a high power conversion efficiency (PCE) of 17.35%, exhibiting no burn-in effect with no reduction in PCE after more than 4000 h of storage. The successful application of CDs in OPV has developed a new avenue for designing efficient ETL materials that benefits the photovoltaic performance of OSCs.
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| http://dx.doi.org/10.1021/acsami.1c23494 | DOI Listing |
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