TY - JOUR
T1 - Type-I alignment in MAPbI3 based solar devices with doped-silicon nanocrystals
AU - Rocks, Conor
AU - Svrcek, Vladimir
AU - Velusamy, Tamilselvan
AU - Macias-Montero, Manuel
AU - Maguire, P
AU - Mariotti, Davide
PY - 2018/8
Y1 - 2018/8
N2 - In this work we couple silicon nanocrystals (Si NCs) with strong quantum confinement (< 4 nm diameter) with large grained MAPbI3 films combining the perovskites excellent transport properties with the unique opto-electronic properties of quantum confined Si NCs. The electronic structures of MAPbI3 and Si NCs, ideally aligned to form a type-I heterojunction, demonstrated improved carrier collection through a higher short-circuit current density (~ 20 mA cm−2) measured in photovoltaic test devices. The addition of p- and n-doped Si NCs within the MAPbI3 films also showed unexpected and interesting device performance improvements, where the typical perovskite degradation process in ambient conditions was considerably slowed down and the overall device efficiency was observed to increase under light soaking. We attribute these improvements to the presence of Si NCs, which helped maintain the perovskite film qualities for more than 14 days in open atmosphere.
AB - In this work we couple silicon nanocrystals (Si NCs) with strong quantum confinement (< 4 nm diameter) with large grained MAPbI3 films combining the perovskites excellent transport properties with the unique opto-electronic properties of quantum confined Si NCs. The electronic structures of MAPbI3 and Si NCs, ideally aligned to form a type-I heterojunction, demonstrated improved carrier collection through a higher short-circuit current density (~ 20 mA cm−2) measured in photovoltaic test devices. The addition of p- and n-doped Si NCs within the MAPbI3 films also showed unexpected and interesting device performance improvements, where the typical perovskite degradation process in ambient conditions was considerably slowed down and the overall device efficiency was observed to increase under light soaking. We attribute these improvements to the presence of Si NCs, which helped maintain the perovskite film qualities for more than 14 days in open atmosphere.
KW - Perovskite
KW - Silicon nanocrystals
KW - Quantum dots
KW - Solar cells
KW - Type-I alignment
UR - https://pure.ulster.ac.uk/en/publications/type-i-alignment-in-mapbi3-based-solar-devices-with-doped-silicon
U2 - 10.1016/j.nanoen.2018.05.036
DO - 10.1016/j.nanoen.2018.05.036
M3 - Article
SN - 2211-2855
VL - 50
SP - 245
EP - 255
JO - Nano Energy
JF - Nano Energy
ER -