TY - GEN
T1 - The role of the hole-transport layer in perovskite solar cells - Reducing recombination and increasing absorption
AU - Tress, Wolfgang
AU - Marinova, Nevena
AU - Inganas, Olle
AU - Nazeeruddin, Mohammad K.
AU - Zakeeruddin, Shaik M.
AU - Graetzel, Michael
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/10/15
Y1 - 2014/10/15
N2 - The role of the hole-transport layer (HTL) in CHjNHPbb perovskite solar cells is investigated. It is found that it mainly serves three purposes: First, deposited prior to the gold electrode, it avoids direct contact of the metal electrode with the mesoporous TiO2-perovskite layer, and therefore increases the selectivity of the contact. This reduces recombination as evident from an increased open-circuit voltage and a higher luminescence efficiency. Second, the HTL increases the internal quantum efficiency independent of applied voltage and illumination wavelength by reducing (diffusion) losses of charges. Third, due to a smoothing of the TiO2-perovskite mesoscopic layer the HTL increases the reflectivity of the gold electrode, allowing for a second path of the light through the absorber. Both effects result in an enhancement of the short-circuit current density.
AB - The role of the hole-transport layer (HTL) in CHjNHPbb perovskite solar cells is investigated. It is found that it mainly serves three purposes: First, deposited prior to the gold electrode, it avoids direct contact of the metal electrode with the mesoporous TiO2-perovskite layer, and therefore increases the selectivity of the contact. This reduces recombination as evident from an increased open-circuit voltage and a higher luminescence efficiency. Second, the HTL increases the internal quantum efficiency independent of applied voltage and illumination wavelength by reducing (diffusion) losses of charges. Third, due to a smoothing of the TiO2-perovskite mesoscopic layer the HTL increases the reflectivity of the gold electrode, allowing for a second path of the light through the absorber. Both effects result in an enhancement of the short-circuit current density.
KW - hole transport layer
KW - incident-photon-to-electron conversion efficiency
KW - internal quantum efficiency
KW - luminescence
KW - perovskite
KW - recombination
KW - solar cell
UR - https://www.scopus.com/pages/publications/84912139559
U2 - 10.1109/PVSC.2014.6925216
DO - 10.1109/PVSC.2014.6925216
M3 - Conference contribution
AN - SCOPUS:84912139559
T3 - 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014
SP - 1563
EP - 1566
BT - 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 40th IEEE Photovoltaic Specialist Conference, PVSC 2014
Y2 - 8 June 2014 through 13 June 2014
ER -
