Photoelectrochromic windows and displays
Photoelectrochromic windows and displays
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DOI：
10.1038/383608a0
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发表时间：
1996-10-17
期刊：
影响因子：
64.8
通讯作者：
Gregg, BA
中科院分区：
文献类型：
--
作者：
Bechinger, C;Ferrer, S;Gregg, BA
光致变色材料（1，2）在吸收光时改变颜色，而电致变色材料（3，4）响应于电诱导的氧化态变化而改变颜色。这两类材料正在研究在显示器，成像设备和“智能”窗口（5- 8，15，16）的潜在应用。在这里，我们描述了这种应用的替代途径，其中电致变色膜和光伏膜形成电化学电池的两个电极。所得结构表现出光致变色，但与传统的光致变色膜不同，光吸收过程（在光伏膜中）与着色过程（在电致变色膜中）是分开的：因此两者都可以单独优化。此外，由于我们的细胞中的着色过程需要两个电极之间的外部电流，因此细胞的光学状态-透明的，吸收的，或者在非均匀照明的情况下，图案化的-可以在电路断开时存储，或者在电极连接时改变。
PHOTOCHROMIC materials(1,2) change colour on absorption of light, whereas electrochromic materials(3,4) change colour in response to an electrically induced change in oxidation state. Both classes of materials are being investigated for potential applications in displays, imaging devices and 'smart' windows(5-8,15,16). Here we describe an alternative route to such applications, in which an electrochromic film and a photovoltaic film form the two electrodes of an electrochemical cell. The resulting structure exhibits photochromism, but unlike conventional photochromic films, the light-absorption process (in the photovoltaic film) is separate from the coloration process (in the electrochromic film): both may therefore he optimized individually. Moreover, as the coloration process in our cells requires an external electrical current between the two electrodes, the optical state of the cell-transparent, absorbing or, in the case of non-uniform illumination, patterned-can be stored when the circuit is open, or changed when the electrodes are connected.