BibTex format
@article{Surel:2025:10.1039/d5el00103j,
author = {Surel, JL and Caprioglio, P and Smith, JA and Dasgupta, A and Furlan, F and Henderson, C and Yang, F and Gallant, BM and Seo, S and Knight, A and Kober-Czerny, M and Luke, J and McMeekin, DP and Tartakovskii, AI and Kim, JS and Gasparini, N and Snaith, HJ},
doi = {10.1039/d5el00103j},
journal = {Ees Solar},
pages = {567--579},
title = {Approaching the radiative limits for wide bandgap perovskite solar cells using fullerene blend electron transport interlayers},
url = {http://dx.doi.org/10.1039/d5el00103j},
volume = {1},
year = {2025}
}
RIS format (EndNote, RefMan)
TY - JOUR
AB - Performance losses in positive–intrinsic–negative architecture perovskite solar cells are dominated by nonradiative recombination at the perovskite/organic electron transport layer interface, which is particularly problematic for wider bandgap perovskites. Large endeavours have been dedicated to the replacement of fullerenes, which are the most commonly used class of electron transport layers, with limited success thus far. In this work, we demonstrate blending the fullerene derivatives [6,6]-phenyl C<inf>61</inf> butyric acid methyl ester (PCBM) and indene-C<inf>60</inf> bis-adduct (ICBA) as a thin interlayer between 1.77 eV bandgap perovskite and an evaporated C<inf>60</inf> layer. By tuning the fullerene blend to a trace 2% by mass of PCBM in ICBA, we remarkably form an interlayer which features improved energetic alignment with the perovskite and the PCBM : ICBA fullerene mixture, together with a stronger molecular ordering and an order of magnitude higher electron mobility than either neat PCBM or ICBA. Additional molecular surface passivation approaches are found to be beneficial in conjunction with this approach, resulting in devices with 19.5% steady state efficiency, a fill factor of 0.85 and an open-circuit voltage of 1.33 V, which is within 10% of the radiative limit of the latter two device parameters for this bandgap. This work highlights the complex nonlinear energetic behaviour with fullerene mixing, and how control of the energetics and crystallinity of these materials is crucial in overcoming the detrimental recombination losses that have historically limited perovskite solar cells.
AU - Surel,JL
AU - Caprioglio,P
AU - Smith,JA
AU - Dasgupta,A
AU - Furlan,F
AU - Henderson,C
AU - Yang,F
AU - Gallant,BM
AU - Seo,S
AU - Knight,A
AU - Kober-Czerny,M
AU - Luke,J
AU - McMeekin,DP
AU - Tartakovskii,AI
AU - Kim,JS
AU - Gasparini,N
AU - Snaith,HJ
DO - 10.1039/d5el00103j
EP - 579
PY - 2025///
SP - 567
TI - Approaching the radiative limits for wide bandgap perovskite solar cells using fullerene blend electron transport interlayers
T2 - Ees Solar
UR - http://dx.doi.org/10.1039/d5el00103j
VL - 1
ER -
