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Query: EC:3.4.16.2 (
PCP
)
3,761
document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)
In this article it is investigated how the hole extraction layer (HEL) influence the charge recombination and performance in half tin and half lead (FASn
0.5
Pb
0.5
I
3
) based solar cells (HPSCs). FASn
0.5
Pb
0.5
I
3
film grown on PEDOT:
PSS
displays a large number of pin-holes and open grain boundaries, resulting in a high defect density and shunts in the perovskite film causing significant bulk and interfacial charge recombination in the HPSCs. By contrast, FASn
0.5
Pb
0.5
I
3
films grown on
PCP
-Na, an anionic conjugated polymer, show compact and pin-hole free morphology over a large area, which effectively eliminates the shunts and trap states. Moreover,
PCP
-Na is characterized by a higher work function, which determines a favorable energy alignment at the anode interface, enhancing the charge extraction. Consequently, both the interfacial and bulk charge recombination in devices using
PCP
-Na HEL are considerably reduced giving rise to an overall improvement of all the device parameters. The HPSCs fabricated with this HEL display power conversion efficiency up to 16.27%, which is 40% higher than the efficiency of the control devices using PEDOT:
PSS
HEL (11.60%). Furthermore,
PCP
-Na as HEL offers superior performance in larger area devices compared to PEDOT:
PSS
.
...
PMID:Enhancing the Performance of the Half Tin and Half Lead Perovskite Solar Cells by Suppression of the Bulk and Interfacial Charge Recombination. 2999 Oct 93
Recent works demonstrate that polyelectrolytes as a hole transport layer (HTL) offers superior performance in Ruddlesden-Popper perovskite solar cells (RPPSCs) compared to poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:
PSS
). The factors contributing to such improvement need to be systematically investigated. To achieve this, we have systematically investigated how the two HTLs affect the morphology, crystallinity, and orientation of the Ruddlesden-Popper perovskite (RPP) films as well as the charge extraction of the RPPSCs. PEDOT:
PSS
as a HTL leads to RPP films of low crystallinity and with a number of large pinholes. These factors lead to poor charge carrier extraction and significant charge recombination in the RPPSCs. Conversely, a
PCP
-Na HTL gives rise to highly crystalline and pinhole-free RPPSC films. Moreover, a
PCP
-Na HTL provides a better energy alignment at the perovskite/HTL interface because of its higher work function compared to PEDOT:
PSS
. Consequently, devices using
PCP
-Na as HTLs are more efficient in extracting charge carriers.
...
PMID:Impact of the Hole Transport Layer on the Charge Extraction of Ruddlesden-Popper Perovskite Solar Cells. 3250 81
