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Near-infrared emission of CaAl6Ga6O19:Cr3+,Ln3+ (Ln = Yb, Nd, and Er) via energy transfer for c-Si solar cells.
Dalton Transactions ( IF 3.5 ) Pub Date : 2020-06-06 , DOI: 10.1039/d0dt01623c Li Kong 1 , Yingying Liu , Langping Dong , Liang Zhang , Lu Qiao , Wensheng Wang , Hongpeng You
Dalton Transactions ( IF 3.5 ) Pub Date : 2020-06-06 , DOI: 10.1039/d0dt01623c Li Kong 1 , Yingying Liu , Langping Dong , Liang Zhang , Lu Qiao , Wensheng Wang , Hongpeng You
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A series of CaAl6Ga6O19:Cr3+,Ln3+ (Ln = Yb, Nd, and Er) novel near-infrared (NIR) emitting phosphors were prepared via a high-temperature solid-state reaction. The luminescence spectra and decay lifetimes of these samples were measured to prove the energy transfer process from the Cr3+ to Ln3+ ions. The CaAl6Ga6O19:Cr3+,Ln3+ (Ln = Yb, Nd, and Er) phosphors can efficiently convert the short-wavelength sunlight in the near-ultraviolet and visible (UV-Vis) regions into near-infrared emission, which matches the higher sensitivity region of the c-Si solar cells. The maximal energy transfer efficiencies of CaAl6Ga6O19:Cr3+,Ln3+ (Ln = Yb, Nd, and Er) were 25.84%, 73.90%, and 29.46%, respectively. Our results show that the CaAl6Ga6O19:Cr3+,Ln3+ (Ln = Yb, Nd, and Er) phosphors have potential applications as luminescent downshifting convertors for enhancing the photoelectric conversion efficiency of the c-Si solar cells.
中文翻译：
CaAl6Ga6O19：Cr3 +，Ln3 +（Ln = Yb，Nd和Er）的近红外发射是通过c-Si太阳能电池的能量转移来实现的。
通过高温固相反应制备了一系列CaAl 6 Ga 6 O 19：Cr 3+，Ln 3+（Ln = Yb，Nd和Er）新型近红外（NIR）发射荧光粉。测量了这些样品的发光光谱和衰变寿命，以证明从Cr 3+到Ln 3+离子的能量转移过程。CaAl 6 Ga 6 O 19：Cr 3+，Ln 3+（Ln = Yb，Nd和Er）磷光体可以有效地将近紫外和可见（UV-Vis）区域中的短波长阳光转换为近红外发射，这与c-Si太阳能的更高灵敏度区域相匹配细胞。CaAl 6 Ga 6 O 19：Cr 3+，Ln 3+（Ln = Yb，Nd和Er）的最大能量转移效率分别为25.84％，73.90％和29.46％。我们的结果表明，CaAl 6 Ga 6 O 19：Cr 3+，Ln 3+ （Ln ＝ Yb，Nd和Er）磷光体作为发光降档转换器具有潜在的应用，以提高c-Si太阳能电池的光电转换效率。
更新日期：2020-06-29
中文翻译：
CaAl6Ga6O19：Cr3 +，Ln3 +（Ln = Yb，Nd和Er）的近红外发射是通过c-Si太阳能电池的能量转移来实现的。
通过高温固相反应制备了一系列CaAl 6 Ga 6 O 19：Cr 3+，Ln 3+（Ln = Yb，Nd和Er）新型近红外（NIR）发射荧光粉。测量了这些样品的发光光谱和衰变寿命，以证明从Cr 3+到Ln 3+离子的能量转移过程。CaAl 6 Ga 6 O 19：Cr 3+，Ln 3+（Ln = Yb，Nd和Er）磷光体可以有效地将近紫外和可见（UV-Vis）区域中的短波长阳光转换为近红外发射，这与c-Si太阳能的更高灵敏度区域相匹配细胞。CaAl 6 Ga 6 O 19：Cr 3+，Ln 3+（Ln = Yb，Nd和Er）的最大能量转移效率分别为25.84％，73.90％和29.46％。我们的结果表明，CaAl 6 Ga 6 O 19：Cr 3+，Ln 3+ （Ln ＝ Yb，Nd和Er）磷光体作为发光降档转换器具有潜在的应用，以提高c-Si太阳能电池的光电转换效率。
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