Back to Search
Start Over
Quaternary quantum dots with gradient valence band for all-inorganic perovskite solar cells.
- Source :
-
Journal of Colloid & Interface Science . Aug2019, Vol. 549, p33-41. 9p. - Publication Year :
- 2019
-
Abstract
- The severe interface charge recombination caused by the large energy difference between perovskite material and carbon electrode significantly limits the further performance improvement of the all-inorganic perovskite solar cells (PSCs). We apply innovatively multilayer of quaternary Ag-In-Ga-S (AIGS) quantum dots (QDs) with cascade-like valence bands as hole-transport materials to assemble all-inorganic PSCs, and the resultant all-inorganic PSCs exhibit a power conversion efficiency (PCE) of 8.46%, which is enhanced by 20.9% in comparison with 7% for the pristine device. The high performance of the PSCs indicates that sequential layers of AIGS QDs with cascade-like energy levels can facilitate the charge separation, reduce the barrier the holes crossing and suppress the charge recombination. Stack of QDs with cascade-like energy levels provide solution-processed PSCs with a new method to enhance device performance. [ABSTRACT FROM AUTHOR]
- Subjects :
- *VALENCE bands
*QUANTUM dots
*SOLAR cells
*SILICON solar cells
*CARBON electrodes
Subjects
Details
- Language :
- English
- ISSN :
- 00219797
- Volume :
- 549
- Database :
- Academic Search Index
- Journal :
- Journal of Colloid & Interface Science
- Publication Type :
- Academic Journal
- Accession number :
- 136463494
- Full Text :
- https://doi.org/10.1016/j.jcis.2019.04.052