TY - JOUR
T1 - Energy and charge transfer effects for hybrids of perovskite CsPbBr3 quantum dots on organic semiconducting rubrene nanosheet
AU - Youn, Jongwon
AU - Park, Cheol Joon
AU - Teng, Xuecheng
AU - Lee, Kwang Sup
AU - Kim, Jeongyong
AU - Joo, Jinsoo
N1 - Funding Information:
This study was supported by the National Research Foundation of Korea funded by the Korean government (No. NRF-2018R1A2B2006369 and NRF-20100020209). One of us, K.-S. Lee also acknowledges for the support by the Mid-Career Researcher Program through the NRF funded by MEST (2016R1A2B4008473).
Funding Information:
This study was supported by the National Research Foundation of Korea funded by the Korean government (No. NRF-2018R1A2B2006369 and NRF-20100020209 ). One of us, K.-S. Lee also acknowledges for the support by the Mid-Career Researcher Program through the NRF funded by MEST ( 2016R1A2B4008473 ).
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/2
Y1 - 2019/2
N2 - Functionalized perovskite CsPbBr3 quantum dots (CsPbBr3-QDs) were loaded on the surface of a p-type organic rubrene (5,6,11,12-tetraphenyltetracene) nanosheet (NS) for the fabrication of a new hybrid nano-system. Using a high–resolution laser confocal microscope, the nanoscale photoluminescence (PL) characteristics of the CsPbBr3-QDs/rubrene-NS hybrids were investigated. We observed a significant enhancement of the PL intensity of the rubrene-NS after the hybridization with the CsPbBr3-QDs, which originated from the fluorescence resonance energy transfer from the CsPbBr3-QDs to the rubrene-NS. The PL enhancement ratio varied according to the density of the QDs on the NS. To investigate the hybridization effect with CsPbBr3-QDs on the electrical characteristics of the rubrene-NS, we fabricated field-effect transistors (FETs) using the pristine and hybrid samples as an active layer. The currents of both FETs using the pristine rubrene-NS and hybrid QDs/rubrene-NS increased with light irradiation through the contribution of photo-excited charges. After the hybridization with the CsPbBr3-QDs on the rubrene channel, both the electrical current and mobility decreased compared with the pristine rubrene-based FET. This can be explained by the relative decrease of hole concentration in the active channel region near dielectric layer through the interfacial charge transfer between the QDs and the NS, as well as the de-doping effect of the QDs on the rubrene-NS. Thus, we observed the energy and charge transfer effects for the CsPbBr3-QDs/rubrene-NS hybrids, which can be applied to advanced nanoscale photonics and optoelectronics.
AB - Functionalized perovskite CsPbBr3 quantum dots (CsPbBr3-QDs) were loaded on the surface of a p-type organic rubrene (5,6,11,12-tetraphenyltetracene) nanosheet (NS) for the fabrication of a new hybrid nano-system. Using a high–resolution laser confocal microscope, the nanoscale photoluminescence (PL) characteristics of the CsPbBr3-QDs/rubrene-NS hybrids were investigated. We observed a significant enhancement of the PL intensity of the rubrene-NS after the hybridization with the CsPbBr3-QDs, which originated from the fluorescence resonance energy transfer from the CsPbBr3-QDs to the rubrene-NS. The PL enhancement ratio varied according to the density of the QDs on the NS. To investigate the hybridization effect with CsPbBr3-QDs on the electrical characteristics of the rubrene-NS, we fabricated field-effect transistors (FETs) using the pristine and hybrid samples as an active layer. The currents of both FETs using the pristine rubrene-NS and hybrid QDs/rubrene-NS increased with light irradiation through the contribution of photo-excited charges. After the hybridization with the CsPbBr3-QDs on the rubrene channel, both the electrical current and mobility decreased compared with the pristine rubrene-based FET. This can be explained by the relative decrease of hole concentration in the active channel region near dielectric layer through the interfacial charge transfer between the QDs and the NS, as well as the de-doping effect of the QDs on the rubrene-NS. Thus, we observed the energy and charge transfer effects for the CsPbBr3-QDs/rubrene-NS hybrids, which can be applied to advanced nanoscale photonics and optoelectronics.
KW - Charge transfer
KW - CsPbBr
KW - Energy transfer
KW - Organic field effect transistor
KW - Perovskite quantum dot
KW - Rubrene
UR - http://www.scopus.com/inward/record.url?scp=85059304874&partnerID=8YFLogxK
U2 - 10.1016/j.orgel.2018.11.029
DO - 10.1016/j.orgel.2018.11.029
M3 - Article
AN - SCOPUS:85059304874
SN - 1566-1199
VL - 65
SP - 243
EP - 250
JO - Organic Electronics: physics, materials, applications
JF - Organic Electronics: physics, materials, applications
ER -