Upconversion quantum yield of Er3+-doped 尾-NaYF4 and Gd2O2S: The effects of host lattice, Er3+ doping, and excitation spectrum bandwidth
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- 作者：Stefan Fischera ; Stefan.fischer@ise.fraunhofer.de" class="auth_mail ; Rosa Martí ; n-Rodrí ; guezb ; Benjamin Frö ; hlicha ; Karl W. Krä ; merc ; Andries Meijerinkb ; Jan Christoph Goldschmidta ; jan.christoph.goldschmidt@ise.fraunhofer.de" class="auth_mail
- 关键词：Upconversion ; Quantum yield ; NaYF4 ; Gd2O2S ; Trivalent erbium ; Broad-band excitation ; Solar energy conversion ; Photovoltaics
- 刊名：Journal of Luminescence
- 出版年：September 2014
- 年：2014
- 卷：153
- 期：Complete
- 页码：281-287
- 全文大小：897 K
文摘
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Upconversion quantum yield for 尾-NaYF4 and Gd2O2S was investigated as a function of the Er3+ doping, the bandwidth of the excitation and the irradiance.
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The best upconversion quantum yield of 15.1% for an irradiance of only 4070 W/m2 was measured for Gd2O2S: 10% Er3+.
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A comparison of internal and external UCQY is conducted.
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External UCQY is more important for most applications, such as harvesting solar energy.
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尾-NaYF4 doped with Er3+ is superior with increasing irradiance and for broad-band excitation, which is more relevant for photovoltaics.