| Title |
Nonfullerene self-assembled monolayers as electron-selective contacts for n-i-p perovskite solar cells |
| Authors |
Utomo, Drajad S ; Svirskaite, Lauryna M ; Prasetio, Adi ; Malinauskiene, Vida ; Dally, Pia ; Aydin, Erkan ; Musiienko, Artem ; Getautis, Vytautas ; Malinauskas, Tadas ; Azmi, Randi ; Wolf, Stefaan De |
| DOI |
10.1021/acsenergylett.4c00306 |
| Full Text |
|
| Is Part of |
ACS Energy letters.. Washington : American Chemical Society. 2024, vol. 9, p. 1682-1692.. ISSN 2380-8195 |
| Keywords [eng] |
extraction ; interfaces ; molecules ; perovskites ; power conversion efficiency |
| Abstract [eng] |
Organic, nonfullerene semiconductors capable of self-assembly and composed of either anthraquinone (AQ) or naphthalenediimide (NDI) central fragments have been designed as electron-selective materials for n-i-p perovskite solar cells (PSCs). Both types of self-assembled monolayer (SAM) molecules contain phosphonic acid as an anchoring group, allowing covalent binding with indium tin oxide (ITO) surfaces. In particular, the NDI-based SAMs showed a more homogeneous anchoring on the ITO substrate and a stronger band bending at the ITO-SAM/perovskite interface than AQ-based SAMs. As a result, low-temperature-processed n-i-p PSCs with NDI SAMs as an electron-selective bottom contact showed a maximum power conversion efficiency (PCE) of 21.5%, representing the highest PCE among n-i-p PSCs with organic electron transporting layers (ETLs). In addition, our NDI-SAM-based devices demonstrate substantially improved long-term stability under operating temperature conditions when compared to devices using SnO2 as the ETL. |
| Published |
Washington : American Chemical Society |
| Type |
Journal article |
| Language |
English |
| Publication date |
2024 |
| CC license |
|
