Abstract
We developed a cost-effective spiro-type 4,4′,4′′,4′′′-(2H,2′H,4H,4′H-3,3′-spiro-bi[thieno[3,4-b][1,4]dioxepine]-6,6′,8,8′-tetrayl)tetrakis(N,N-bis(4-methoxyphenyl)aniline) hole transporting material (PST1) for perovskite solar cells (PSCs) that works efficiently even without a cobalt dopant. The PST1 is obtained by employing facile synthetic routes and tends to crystallize in the solid state. An X-ray diffraction study of PST1 revealed a unique quasi-spiro molecular configuration and found multiple CH/π and π-π intermolecular contacts. For the first time, the crystal structure of 2,2′,7,7′-tetrakis(N,N′-di-p-methoxyphenylamine)-9,9′-spirobifluorene (spiro-OMeTAD) is also studied for comparison. The device based on PST1 exhibited a PCE of 13.44%, and a comparable 12.74% PCE was achieved for its undoped form, which paves the way for developing new low cost hole transporting materials and final industrialization of perovskite solar cells.
| Original language | English |
|---|---|
| Pages (from-to) | 1986-1991 |
| Number of pages | 6 |
| Journal | Energy and Environmental Science |
| Volume | 8 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - Jul 1 2015 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2015 The Royal Society of Chemistry.
ASJC Scopus Subject Areas
- Environmental Chemistry
- Renewable Energy, Sustainability and the Environment
- Nuclear Energy and Engineering
- Pollution
