AI Article Synopsis
- The development of a stable and efficient hole extraction layer (HEL) is essential for the commercial viability of organic solar cells (OSCs).
- Graphene oxide (GO) is emerging as a promising HEL, showing performance comparable to traditional materials, but comprehensive studies on its behavior in OSCs are still needed.
- This article highlights GO's excellent properties, including a six-fold increase in shelf lifetime and a reduced space-charge limited region, which may explain its longevity and potential for advancing OSC technology.
Article Abstract
The development of an efficient and stable hole extraction layer (HEL) is crucial for commercializing organic solar cells (OSCs). Although a few candidates have been widely utilized as HELs for OSCs, the most appropriate material has been lacking. A few articles have recently reported graphene oxide (GO) as a well-working HEL that offers comparable performance to conventional HELs. However, a systematic study providing comprehensive insight into the GO-based OSC behavior is lacking. This article discusses broad topics, including the material properties, device efficiency, shelf lifetime, and impedance properties. We found that GO offers excellent properties, which are identical to those of conventional HELs, while the shelf lifetime shows a significant 6-fold increase. Furthermore, we discuss the significantly reduced space-charge limited region of an aged GO-based OSC compared with a PEDOT:PSS-based device, which is revealed to be a reason for the different shelf lifetime. We believe that the results will accelerate the development of GO as an HEL for OSCs and other optoelectronic devices.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9037667 | PMC |
| http://dx.doi.org/10.1039/d1ra02452c | DOI Listing |
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