Perovskite solar cells employing CH3NH3PbI3-xClx active layers show power conversion efficiency (PCE) as high as 20% in single cells and 13% in large area modules. However, their operational stability has often been limited due to degradation of the CH3NH3PbI3-xClx active layer. Here, we report a perovskite solar module (PSM, best and av. PCE 10.5 and 8.1%), employing solution-grown TiO2 nanorods (NRs) as the electron transport layer, which showed an increase in performance (∼5%) even after shelf-life investigation for 2500 h. A crucial issue on the module fabrication was the patterning of the TiO2 NRs, which was solved by interfacial engineering during the growth process and using an optimized laser pulse for patterning. A shelf-life comparison with PSMs built on TiO2 nanoparticles (NPs, best and av. PCE 7.9 and 5.5%) of similar thickness and on a compact TiO2 layer (CL, best and av. PCE 5.8 and 4.9%) shows, in contrast to that observed for NR PSMs, that PCE in NPs and CL PSMs dropped by ∼50 and ∼90%, respectively. This is due to the fact that the CH3NH3PbI3-xClx active layer shows superior phase stability when incorporated in devices with TiO2 NR scaffolds.

Fakharuddin, A., Di Giacomo, F., Palma, A.l., Matteocci, F., Ahmed, I., Razza, S., et al. (2015). Vertical TiO<inf>2</inf> Nanorods as a Medium for Stable and High-Efficiency Perovskite Solar Modules. ACS NANO, 9(8), 8420-8429 [10.1021/acsnano.5b03265].

Vertical TiO2 Nanorods as a Medium for Stable and High-Efficiency Perovskite Solar Modules

DI GIACOMO, FRANCESCO;Matteocci, F;D'EPIFANIO, ALESSANDRA;LICOCCIA, SILVIA;DI CARLO, ALDO;BROWN, THOMAS MEREDITH;
2015

Abstract

Perovskite solar cells employing CH3NH3PbI3-xClx active layers show power conversion efficiency (PCE) as high as 20% in single cells and 13% in large area modules. However, their operational stability has often been limited due to degradation of the CH3NH3PbI3-xClx active layer. Here, we report a perovskite solar module (PSM, best and av. PCE 10.5 and 8.1%), employing solution-grown TiO2 nanorods (NRs) as the electron transport layer, which showed an increase in performance (∼5%) even after shelf-life investigation for 2500 h. A crucial issue on the module fabrication was the patterning of the TiO2 NRs, which was solved by interfacial engineering during the growth process and using an optimized laser pulse for patterning. A shelf-life comparison with PSMs built on TiO2 nanoparticles (NPs, best and av. PCE 7.9 and 5.5%) of similar thickness and on a compact TiO2 layer (CL, best and av. PCE 5.8 and 4.9%) shows, in contrast to that observed for NR PSMs, that PCE in NPs and CL PSMs dropped by ∼50 and ∼90%, respectively. This is due to the fact that the CH3NH3PbI3-xClx active layer shows superior phase stability when incorporated in devices with TiO2 NR scaffolds.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore ING-INF/01 - Elettronica
Settore CHIM/07 - Fondamenti Chimici delle Tecnologie
eng
Con Impact Factor ISI
energy conversion; nanorod solar cells; photovoltaic; stable solar module
https://www.scopus.com/record/display.uri?eid=2-s2.0-84940092763&origin=resultslist&sort=plf-f&src=s&st1=licoccia&nlo=1&nlr=20&nls=&sid=AEF842E0DEAD9C746E1BA9AB16C5ABAF.f594dyPDCy4K3aQHRor6A%3a110&sot=anl&sdt=cl&cluster=scopubyr%2c%222015%22%2ct&sl=36&s=AU-ID%28%22Licoccia%2c+Silvia%22+7004735436%29&relpos=3&citeCnt=11&searchTerm=
Fakharuddin, A., Di Giacomo, F., Palma, A.l., Matteocci, F., Ahmed, I., Razza, S., et al. (2015). Vertical TiO2 Nanorods as a Medium for Stable and High-Efficiency Perovskite Solar Modules. ACS NANO, 9(8), 8420-8429 [10.1021/acsnano.5b03265].
Fakharuddin, A; DI GIACOMO, F; Palma, A; Matteocci, F; Ahmed, I; Razza, S; D'Epifanio, A; Licoccia, S; Ismail, J; DI CARLO, A; Brown, Tm; Jose, R
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/149587
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