Photoacoustic characterization of optical and thermal properties of CdSe quantum dots

Photoacoustic Study of CdS QDs for Application in Quantum-Dot-Sensitized Solar Cells

“…Due to quantum confinement effect, they show size dependent optical, thermal, electrical, and photoluminescence properties. Particularly, II-VI semiconductor nanoparticles are currently of great interests for their practical applications in a variety of optoelectronic devices such as, high efficiency thin film transistors, light-emitting diodes [2], electron-beam pumped lasers, and electroluminescent devices [3][4][5][6][7][8]. CdS quantum dots (QDs) have become a very attractive promising material for many specific applications in solar energy conversion.…”

“…Generally, the absorption spectra can be measured by the conventional transmitted intensity method however; samples should be sufficiently thin and have good quality surfaces by pretreatments. This requires samples to be placed in a matrix of transparent material which on the other hand would interfere with the measurements of thermal properties [8]. Photoacoustic (PA) technique is proved to be useful for investigating the optical absorption of opaque samples as well as thermal properties of various materials by measuring the nonradioactive deexcitation processes [9,10].…”

Thermal diffusivity of a SNAB glass system doped with CdS nanocrystals and Nd3+

“…Even though an extensive number of works report on the optical and magnetic properties nanocrystals doped glass [7][8][9][10], there are few studies on their thermal characteristics [12][13][14][15], such as the thermal diffusivity (D) and thermal conductivity (K). When considering the performance of optical devices, thermal issues have to be evaluated, especially heat dissipation.…”

“…It is advantageous compared to the conventional techniques because it is remote, nondestructive and fast (usually in the millisecond scale). Although TL has been used in a wide range of materials such as glass, polymers and liquid crystals, it was only used to determine D in colloidal solutions doped with semiconductor nanocrystals [12][13][14][15]20]. To our knowledge this is the first time the TL technique has been used to determine the contribution of semiconductor nanocrystals and Nd 3+ ions to the thermal diffusivity of a glass matrix host.…”

Photoacoustic Study of Optical and Thermal Properties of CdTe Quantum Dots

“…During the last two decades, research on quantum size semiconductor particles has increased enormously. This is due to their exciting novel properties such as optical, thermal and electronic properties, when they have size comparable to, or smaller than, the dimensions of the exciton within their corresponding bulk material, in particular, II -VI semiconductor nanoparticles are currently of great interests for their practical applications in a variety of optoelectronic devices such as, high efficiency thin film transistors, lightemitting diodes, electron-beam pumped lasers, electroluminescent devices and others [1][2][3]. Recently, CdTe Semiconductor nano crystals (i.e.…”