Structure and Property Investigation of a Bi-based Perovskite, Solid Solution (1x)Bi(Ni1/2Ti1/2)O3–xPbTiO3 Extending the investigations on Bi-based perovskite solid solutions for high-temperature piezoelectric ceramics, this paper considers the binary solid-solu... SM Choi,CJ Stringer,TR Shrou...
high absorption coefficientoptical propertiestandem solar cellsAll existing solar cell materials including hybrid perovskites show rather small absorption coefficient (α) of ∽104 cm1 in the bandゞap (Eg) transition region. The weak band〆dge light absorption is an essential problem, limiting ...
Using the transmission open-aperture Z-scan technique, we estimated the values of the two-photon absorption coefficient to be 8.5 cm GW-1, which is much higher than that of standard two-photon absorbing materials that are industrially used in nonlinear optical applications, such as LiNbO3, LiT...
Associated with an Sn‐component dependent band gap, a CH3NH3Pb0.75Sn0.25I3 perovskite thin film is fabricated, whose nonlinear two‐photon absorption can expand the optical response up to 1.8 μm. Two‐photon absorption is studied and a very large absorption coefficient of 1.15 cm kW?1 is ...
The suitable band structure is vital for perovskite solar cells, which greatly affect the high photoelectric conversion efficiency. Cation substitution is an effective approach to tune the electric structure, carrier concentration, and optical absorption of hybrid lead iodine perovskites. In this work, ...
An XAS spectrum is obtained by measuring the modulation of the sample absorption coefficient as a function of the incident X-ray beam energy. Data are usually collected in transmission detection mode, although fluorescence and electron yield detection modes are often used. The XAS spectrum is ...
Role of interband and photoinduced absorption in the nonlinear refraction and absorption of resonantly excited PbS quantum dots around 1550 nm The nonlinear refractive index nand absorption coefficient 尾 of PbS quantum dots (Qdots) is determined around 1550 nm with the Z-scan technique, using a ...
This fete has been made possible due to the specific optoelectronic properties of the hybrid perovskites [[7], [8], [9], [10]] such as high absorption coefficient, direct band gap and charge transport properties. However, as in the case of organic solar cells, this tempting attraction of...
22. We found other perovskite materials, such as MAPbBr3, also showed below-gap absorption. Similar to silicon single crystal solar cells, further improvement of the device efficiency may be achieved by utilizing the below-bandgap absorption. However, the absorption coefficient corresponding to the ...
where β (cm W−1) is the 2PA coefficient, I (W cm−2) is the light intensity entering the sample and \(\hbar \omega\) (J) is the incident photon energy. Since the absorption coefficient of 2PA is typically low, high intensities are required. Despite the importance of reveal...