Abstract
ABSTRACT The organic Eu3+-complex [Eu(TTA)3Phen] has been incorporated into the channels of surface-modified frustules from diatoms as a key material to absorb and convert UV-photons to visible luminescence. Systematic investigation results indicate that the organic Eu3+-complex encapsulated in the functionalized diatomite channels exhibits enhanced luminescence and longer lifetime, owning to the Eu(TTA)3Phen complex interacting with its surrounding silylating agents. The organic Eu3+-complex-anchored porous diatomite hybrid luminescent material was compounded with polyethylene terephthalate (PET) by using a mini-twin screw extruder to prepare a self-supporting film of the hybrid material. Besides, the UV absorption properties of the composite films were investigated. These films will potentially be related to the UV protection of photovoltaic devices.
Highlights
Ultraviolet (UV) light reaches the surface of the Earth after passing through the stratospheric ozone layer [1,2,3] causing the degradation and aging of organic mate rials, especially polymer materials including films and fibres
Organic Eu3+-complex anchored at porous diatomite channels through covalent bonding
We put effort to explore the new usage of porous natural material, diatomite, for high effi cient luminescent materials and further for UV protection in soft host
Summary
Ultraviolet (UV) light reaches the surface of the Earth after passing through the stratospheric ozone layer [1,2,3] causing the degradation and aging of organic mate rials, especially polymer materials including films and fibres. The weak stability of polymer solar cells becomes the critical obstacles for commercial applica tions outdoors, because the active layer materials of the photovoltaic devices suffer from damage under UV radiation reducing photovoltaic performance [5,6]. The ETP complex has been reported to be an excellent luminescence material absorbing UV-A (315–400 nm) and UV-B (280– 315 nm) [16,17,21]. It has been reported that the ETP complex can be doped to mesoporous silica materials, such as MCM-41, FDU-1 and SBA-15 [19,20,22,23,24]. This organicinorganic hybrid luminescent material was applied as UV absorbance additive for PET composite film, and exhibited excellent UV-protection properties
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