Light Fribourg
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Hans U. Güdel Department für Chemie und Biochemie
Seminar Fribourg, 13.10.2009
Making light
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Maing !ight
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"rea i!!uminator#
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$%&D 'echno!og(
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) %ight
) *hite and co!oured !ight
) +hoto!umine#cence, pho#phor#) Spectrum
) %ight emitting diode# %&D-
) $ut!oo
Maing !ight
) %ight
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) %ight
Maing !ight
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Fiat %u
1 in principio crea/it Deu# cae!um et terram
2 terra autem erat inani# et /acua et tenebrae #uper
faciem ab(##i et #piritu# Dei ferebatur #uper aua#
3 diitue Deu# fiat !u et facta e#t !u et /idit Deu# !ucem uod
e##et bona et di/i#it !ucem
ac tenebra#
Fir#t Boo Mo#e# ene#i#-, Chapter 1
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B!ac bod( radiation
Temperature: Colour:
2004C
0004C
5004C
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B!ac bod( radiation
Temperature: Colour:
0004C
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6uman e(e photoreceptor#
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7ncande#cent !amp
2004C
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Di#per#ion of 8hite !ight
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Maing !ight "dditi/e miing
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Chromaticit( Diagram
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+hoto!umine#cence
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:a#ha;#
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%ight emitting #emiconductor
Light emission
Conduction band
=a!ence band
+
–
Bandgap
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+hoto!umine#cence of
CdSe >anopartice!#
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F!uore#cent !amp
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%umine#cent pho#phor#
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%amp and di#p!a( phophor#
BaMg"!10$15 &u2?
Ce,d-MgB$10 'b3?
@2$3 &u3?
Audith rimm
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'he %anthanide#
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Co!oured !ight
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%&D ba#ed techno!og(
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%ight emitting diode# %&D-
Electroluminescence
Conduction band
=a!ence band
+
–
Bandgap
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%&D Materia!#
Inorganic
777 = Semiconductor#
"!, a, 7n >, +, "#, Sb
"! a "#
"! a 7n +
"! a +
a >
Organic OLE!"
+o!(meric !umine#cent
mo!ecu!e# 8ith conugated
e!ectron #(#tem#
+o!(phen(!en/in(!ene
n
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%ight emitting po!(mer
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Mirco Co!ombo citation#, 3 paper#
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Diode #pectra
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*hite diode !amp
@3 "!2"!$-3 Ce3? Diode
+
–
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Chromaticit( Diagram
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&nerg( efficienc( of !ight #ource#
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Light sources
'echno!og( #tep#
Electronics
Tu#e
ana!og
Tu#e !iode
So!id
Micro
electronics
digita!,
#o!id
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"rea i!!uminator#
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"cno8!edgment
abrie!a Frei
