Dear Alaa Al Hamed!

I hope this book will be helpful.

Graphene for Flexible Lighting and Displays Book • 2020

ISBN 978-0-08-102482-9

(A volume in Woodhead Publishing Series in Electronic and Optical Materials)

Description About the Book

Graphene for Next Generation Lighting and Displays provides readers with a comprehensive overview of graphene, flexible graphene electrodes, and graphene-based next-generation display and lighting. The book covers a wide range of information, including the basic physics of graphene and recent trends in technical developments for graphene-based flexible and stretchable light-emitting devices. In addition, it discusses future prospects and suggests further directions for research on graphene-based next-generation displays and lightings.

In addition, the book includes sections on the fundamental properties of graphene, synthetic methods of graphene, preparation of graphene electrodes and composite electrodes, and doping methods for graphene electrodes. Potential applications are also addressed including graphene-based flexible electrodes, buffer layer, emitters, and graphene-based stretchable electrodes.

Dear Alaa Al Hamed , there isn´t a single and simple description of the best solution for lighting or artworks, such solution would be dependent on the material and properties of the particular artwork on display. Most of the pieces in display at museums were created for enjoying them with our eyes, so with visible light, and therefore any light source able to produce this kind of light spectrum would be useful to see the works in all their greatness. It happens, however, that many light sources produce an extended spectrum, including UV and IR light, these radiations are not visible to our eyes, but they also reach the materials.

Light can trigger photochemical reactions over the materials, pigments, varnishes, etc. Often the main source of degradative effects are the more energetic radiations, in particular the UV wavelengths, and therefore filters could be used to cut that part of the spectrum of your source or well choosing a source able to emit just light in the Visible range, such as LED´s.

IR radiation also can cause damage by photochemical reactions, but also produce heat, that can induce further degradation of the work.

Visible light can also produce photochemical damage, but cutting some part of the visible spectrum would change the appearance of the artwork, so a kind of equilibrium must be applied, exposing the piece under a mild illumination with the broad visible spectrum or exposing it to light for a limited time.

Sometimes the photochemical effect trigged by light need some other component, like oxigen, and therefore if the work can be exposed in a vacuum or in a inert gas atmosphere the effect of light would be lower or not at all.

About the graphene light bulb, it has the benefit of produce light in a tunable way, and mainly in the visible and IR region of the spectrum, which is good news because you don´t need to use filters to cut the UV, and it is said that this light bulb is very efficient, consuming low energy. This saving of energy (money) should be pondered with the price of such light bulbs, I mean, may be some other technology will offer the same kind of light (white light) without the added cost of this new one.

Note: Some artworks were designed to show fluorescence or phosforescence and they could need a excitation light that often lies in the UV, and in these cases you would need such kind of light in your lighting system.

Please have a look to the following links, about lighting in museums and graphene light that I think could be useful for your work:

https://www.nature.com/articles/nnano.2015.118

https://books.google.es/books?id=7egSEAAAQBAJ&pg=PA315&lpg=PA315&dq="good+lighting+for+museums,+galleries+and+exhibitions"&source=bl&ots=HPQUA3z46G&sig=ACfU3U3VnsYJJFAorKpr5peuuIge6jiabA&hl=en&sa=X&ved=2ahUKEwi-idfL5vHwAhUCyxoKHRWXDUMQ6AEwDnoECAsQAw#v=onepage&q="good%20lighting%20for%20museums%2C%20galleries%20and%20exhibitions"&f=false

To see something about light degradation in modern artworks you can have a look to our work too.

Hope it helps.