TY - JOUR
T1 - Printable luminescent down shifter for enhancing efficiency and stability of organic photovoltaics
AU - Kettle, J.P.
AU - Bristow, N.D.
AU - Kettle, J.
AU - Bristow, N.
AU - Gethin, D.T.
AU - Tehrani, Z.
AU - Moudam, O.
AU - Li, B.
AU - Katz, E.A.
AU - dos Reis Benatto, G.A.
AU - Krebs, F.C.
PY - 2015/10/23
Y1 - 2015/10/23
N2 - The proof of concept of using luminescent down shifting (LDS) layers as alternative UV filters for P3HT:PCBM OPVs is demonstrated using a lanthanide-based metal complex. The results are verified using a combination of indoor light soaking, with single cell devices, and outdoor performance monitoring, using a 16-cell monolithically connected OPV module. By applying the LDS layer, a ~5% relative enhancement in photocurrent is observed for both sets of devices. More significantly, indoor light soaking tests on single cell devices without encapsulation showed an 850% enhancement in the measured half-life (T50%). The OPV modules were encapsulated and tested for outdoor stability over a 70 day period in the Negev desert, Israel. The modules made with the LDS filter are shown to match the stability of those made with a commercial UV filter and outperform the modules with no filter applied, with a 51% enhancement in the measured stability (T75%). Significantly, the work provides clear experimental evidence that the LDS layer can act as a UV filter in OPVs without compromising the efficiency of the solar cell, thus providing an added benefit over commercial UV filters.
AB - The proof of concept of using luminescent down shifting (LDS) layers as alternative UV filters for P3HT:PCBM OPVs is demonstrated using a lanthanide-based metal complex. The results are verified using a combination of indoor light soaking, with single cell devices, and outdoor performance monitoring, using a 16-cell monolithically connected OPV module. By applying the LDS layer, a ~5% relative enhancement in photocurrent is observed for both sets of devices. More significantly, indoor light soaking tests on single cell devices without encapsulation showed an 850% enhancement in the measured half-life (T50%). The OPV modules were encapsulated and tested for outdoor stability over a 70 day period in the Negev desert, Israel. The modules made with the LDS filter are shown to match the stability of those made with a commercial UV filter and outperform the modules with no filter applied, with a 51% enhancement in the measured stability (T75%). Significantly, the work provides clear experimental evidence that the LDS layer can act as a UV filter in OPVs without compromising the efficiency of the solar cell, thus providing an added benefit over commercial UV filters.
U2 - 10.1016/j.solmat.2015.09.037
DO - 10.1016/j.solmat.2015.09.037
M3 - Article
SN - 0927-0248
VL - 144
SP - 481
EP - 487
JO - Solar Energy Materials and Solar Cells
JF - Solar Energy Materials and Solar Cells
ER -