I have Dy3+ doped glass samples which exhibit lifetime like 100-300 microseconds. When I look to the conventional phosphors such as Ce:YAG they have lifetime values like 20-100 nanoseconds.
Dear Orhan,
Rare earth ions such as Eu3+, Tb3+, Dy3+, Sm3+, Pr3+, Nd3+, Er3+, Ho3+ have lifetime in the range of 100 microseconds to 30 milliseconds because of their forbidden f-f transitions. However, ions such as Eu2+ have lifetime in microseconds (500 ns to 20 microseconds) whereas Ce3+ have lifetime in nanoseconds (less then 50 ns). This is due to the fact that Eu2+ and Ce3+ have allowed f-d transitions which is in contrast to the f-f transitions.
Ions such as Er3+, Nd3+ have long lifetime therefore its applications are in the field of lasers, optical fiber amplifiers and Dy3+ doped CaSO4 in thermo-luminescence. On the other hand Ce3+ with nano seconds lifetime is commercially useful in scintillator where the instruments require very fast response.
Dear Orhan,
Rare earth ions such as Eu3+, Tb3+, Dy3+, Sm3+, Pr3+, Nd3+, Er3+, Ho3+ have lifetime in the range of 100 microseconds to 30 milliseconds because of their forbidden f-f transitions. However, ions such as Eu2+ have lifetime in microseconds (500 ns to 20 microseconds) whereas Ce3+ have lifetime in nanoseconds (less then 50 ns). This is due to the fact that Eu2+ and Ce3+ have allowed f-d transitions which is in contrast to the f-f transitions.
Ions such as Er3+, Nd3+ have long lifetime therefore its applications are in the field of lasers, optical fiber amplifiers and Dy3+ doped CaSO4 in thermo-luminescence. On the other hand Ce3+ with nano seconds lifetime is commercially useful in scintillator where the instruments require very fast response.
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Physical Phenomena
- Luminescence