Organic-inorganic hybrid solar cells made from hyperbranched phthalocyanines

Li, Yong; Yan, Ming; Jiang, Minlin; Dhakal, Rabin; Thapaliya, Prem; Yan, Xingqing

doi:10.1117/1.3565463

Cited by 15 publications

(3 citation statements)

References 26 publications

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“…8 and 9), it is clearly seen that the initial two-photon anisotropy for both TPP-Rh and Rh B (~0.48) are much higher than that observed for one-photon anisotropy (~0. 25), and similar to reference values (24). This confirms twophoton excitation and indicates that the two-photon anisotropy decay measurements could be used to detect RET in TPP-Rh.…”

Section: Fluorescence Anisotropysupporting

confidence: 84%

“…Time‐resolved polarized fluorescence measurements were made using a femtosecond up‐conversion technique. Solutions containing 100 μ m of the respective dyes were prepared in spectroscopic grade dichloromethane and the measurements carried out as described in previous reports . Briefly, the polarization of the excitation beam was controlled using a Berek plate.…”

Section: Methodsmentioning

confidence: 99%

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Enhanced Singlet Oxygen Generation from a Porphyrin–Rhodamine B Dyad by Two‐Photon Excitation through Resonance Energy Transfer

Ngen

Xiao

Rajaputra

et al. 2013

Photochem & Photobiology

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Mitochondrial-targeting photosensitizers have been associated with effective photodynamic responses. However, most photosensitizers absorb light between 400 and 700 nm, where light penetration through tissues is limited. Two-photon excitation is a rational approach to improve light penetration through tissues. In this report, the two-photon photophysical properties of a porphyrin-rhodamine B conjugate (TPP-Rh), previously demonstrated to target the mitochondria, were evaluated. The properties studied included: two-photon absorption (TPA) cross sections (σ2 ); resonance energy transfer (RET) kinetics and dynamics; and singlet oxygen generation. The conjugation of Rh B to TPP-OH approximately doubled the σ2 of TPP-Rh at 800 nm (40 ± 4 GM) compared with the parent porphyrin, TPP-OH (16 ± 4 GM). Furthermore, the rate of DPBF oxidation by singlet oxygen generated from TPP-Rh was twice as fast compared with that from TPP-OH (73 % versus 33% in 10 min) following two-photon excitation at 800 nm. In addition, a significantly stronger luminescence signal was detected from TPP-Rh, than from TPP-OH at 1270 nm, following two-photon excitation. This study indicates that conjugating photosensitizers to Rh B could provide greater TPA at the near-infrared range in addition to preferential mitochondrial accumulation for improved photodynamic responses.

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Section: Fluorescence Anisotropysupporting

confidence: 84%

Section: Methodsmentioning

confidence: 99%

Enhanced Singlet Oxygen Generation from a Porphyrin–Rhodamine B Dyad by Two‐Photon Excitation through Resonance Energy Transfer

Ngen

Xiao

Rajaputra

et al. 2013

Photochem & Photobiology

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show abstract

“…The highly ordered mesoporous TiO 2 was deposited by sol gel technique as described by Tian et al (Tian et al 2005). CuSCN thin film was prepared by spin coating the saturated solution of CuSCN in dipropyl sulphide and dried in vacuum oven at 80 0 C (Li et al, 2011). The thickness of all three films ZnO, ITO and TiO 2 film was about 100 nm and the thickness of AlSb layer is ~1 micron.…”

Section: Solar Cell Fabricationmentioning

confidence: 99%