Building integrated PV

Work package 1b: Breakthrough technologies for sustainable energy supply – PV

Principal investigator

Other researchers

Erwin Kessels

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Work package 1b: Breakthrough technologies for sustainable energy supply – PV

Objectives

Opening up the prospects of cost-effective, high conversion efficiency thin film hybrid perovskite solar
cells in building-integrated photovoltaics (BIPV).
BIPV is one of the most exciting opportunities to deliver clean electricity and meet the energy
demands of buildings. Next to the PV panel integration on rooftops, integration in façades and, in
particular, in windows, is highly interesting because of the several and different exposure to sunlight.
In the latter case, semi-transparent devices are demanded: next to high conversion efficiency, visual
comfort, expressed in average visible light transmittance (AVT), is also necessary. Hybrid perovskite
thin film PV, nowadays widely acknowledged for their high efficiency values up to 23% and low cost
processability, has presently the potential for successful integration in buildings, especially in windows,
because the control on the perovskite absorber morphology can lead to neutral-tinted films, with
minimal impact on the spectral properties of the light entering indoor. In parallel, from a processing
point of view, atomic layer deposition (ALD) has recently gained widespread attention for tailoring
interface properties in hybrid perovskites, known to play a critical role on efficiency conversion and
environmental stability of the PV device. TU/e and Solliance have already successfully demonstrated
the integration of ALD layers in hybrid perovskite devices, such as metal oxide charge transport
layers, transparent conductive oxide contact layers and passivation layers. The next challenge is to
combine ALD and hybrid perovskite PV to deliver environmentally stable, semi-transparent and
efficient devices for BIPV.
This WP embraces the full spectrum of research activities, i.e. from fundamental studies on novel
materials and interfaces for semi-transparent hybrid perovskite PV (carried out from TU/e and
Solliance) to more application-oriented work. Specifically, the latter focuses on market potential and
grid impact of BIPV and development of perovskite based BIPV for rural and urban areas, including
high-rise buildings (carried out from Solliance, Campina and Solarge). This WP contributes to the
cross-over character of this proposal because it addresses technological breakthroughs to create
disruptive but cost-effective pathways for solar energy harvesting.

Activities

  1. Synthesis of novel morphologies of the hybrid perovskite absorber to deliver high conversion
    efficiency and acceptable AVT (Solliance)
  2. Design and engineering of films and interfaces by ALD for perovskite absorber passivation; ultrathin
    and highly transparent carrier-selective transport layers and transparent conductive
    electrodes; thin-film based moisture barrier approaches to guarantee a long shelf-life for BI
    perovskite PV (TU/e and Solliance)
  3. Generation of insights into the mechanisms of selected charge transport at interfaces in hybrid
    perovskites by adopting sensitive diagnostics (e.g. UV photo-electron spectroscopy, ultraelectrodeless
    photoconductivity and impedance spectroscopy) to probe carrier transport, trap
    densities, and recombination processes (TU/e)
  4. Market potential research for BIPV at farmers (Solarge, Campina and Enexis)
  5. Surveys on human perceptions regarding BIPV and PV-fields (Solarge)

Expected output

  1. Demonstration of new morphologies of the perovskite absorber (Solliance, MM18)
  2. Demonstration of contact stacks with excellent passivating properties, efficient carrier selection and
    transport (TU/e, MM24)
  3. Demonstration of intrinsic and extrinsic moisture barrier thin film approaches to deliver
    environmentally stable perovskite PV devices (TU/e, MM30)
  4. Demonstration of a semi-transparent hybrid perovskite device combining novel morphologies of the
    absorber layer to increase the device AVT and highly transparent electrodes and transport layers
    towards an efficiency of 10-15% with an AVT in the range of 20-30%, TRL 2 (Solliance and TU/e,
    MM48)
  5. Scientific papers in peer-reviewed journals (5x) and 1 PhD thesis (TU/e, MM18-48)
  6. Definition of low cost solutions, quick to install, BIPV technologies for rural areas (Solarge,
    Campina, Enexis and Solliance, MM36)
  7. Definition of low cost solutions, quick to install, BIPV technologies for urban areas, including highraise
    buildings (Solarge, Enexis and Solliance, MM48)
  8. BIPV approaches of Solarge moved from TRL 4 to 6, by adopting hybrid perovskite thin film PV
  9. Papers on BIPV, regulatory framework needed to accelerate the implementation of BIPV and
    business models and impact of BIPV (Solarge and Solliance, MM18-48)