Journal
RSC ADVANCES
Volume 11, Issue 7, Pages 3792-3800Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ra00090j
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [21975260]
- Recruitment Program of Global Experts of China [201613, Y8d3071caa]
Ask authors/readers for more resources
The power conversion efficiency of perovskite solar cells increased rapidly within 11 years, and modifying the interface with organic semiconductors can effectively enhance the device's PCE. Decorating the interface with A-D-A type fused-ring organic semiconductors can improve electron extraction and charge transport, thereby enhancing the performance of perovskite solar cells.
It took only 11 years for the power conversion efficiency (PCE) of perovskite solar cells (PSCs) to increase from 3.8% to 25.2%. It is worth noting that, as a new thin-film solar cell technique, defect passivation at the interface is crucial for the PSCs. Decorating and passivating the interface between the perovskite and electron transport layer (ETL) is an effective way to suppress the recombination of carriers at the interface and improve the PCE of the device. In this work, several acceptor-donor-acceptor (A-D-A) type fused-ring organic semiconductors (FROS) with indacenodithiophene (IDT) or indacenodithienothiophene (IDDT) as the bridging donor moiety and 1,3-diethyl-2-thiobarbituric or 1,1-dicyromethylene-3-indanone as the strong electron-withdrawing units, were deposited on the SnO2 ETL to prepare efficient planar junction PSCs. The PCEs of the PSCs increased from 18.63% for the control device to 19.37%, 19.75%, and 19.32% after modification at the interface by three FROSs. Furthermore, impedance spectroscopy, steady-state and time-resolved photoluminescence spectra elucidated that the interface decorated by FROSs enhance not only the extraction of electrons but also the charge transportation at the interface between the perovskite and ETL. These results can provide significant insights in improving the perovskite/ETL interface and the photovoltaic performance of PSCs.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available