Broadband pump-probe (BBPP) experiments were conducted on a home-built 2-dimensional electronic spectrometer described in detail in a previous publication. Briefly, the 800nm output of the Ti-sapphire regenerative amplifier was used to pump a home-built non-collinear optical parametric amplifier (NOPA) with its central wavelength tuned to ∼540 nm. The NOPA output was then compressed using a single-grating and single-prism compressor to give laser pulses close to the transform limit with bandwidth of 27 nm and a duration of 24 fs (ESI). A diffractive optic element split the beam into the pump and probe. The pump and probe therefore had identical Figure The synthetic route of chromophore, pillar and LHC.