Posts Tagged ‘Building Integrated Photovoltaics’

21 July

Perovskite Solar Cell Technology of Oxford PV, The Potential Game-Changer


Dear Friends, Visitors/Viewers/Readers,

(Please click on red links and note magenta)

At InterSolar North America 2014 in San Francisco, CA, I came across a potentially game-changing technology that holds much promise for low cost solar power in the future.  This technology, the perovskite thin-film solar cells, is currently being developed by Oxford PV (a spin-out from the University of Oxford in 2009-2010 to commercialize this technology, which has exclusively licensed the intellectual property developed by Professor Henry Snaith and his team of 20 scientists). The perovskite thin-film solar cells can be directly printed/sprayed onto glass to produce a semi-transparent colored coating. Below is an interview with the Chief Technology Officer, Dr. Christopher Case, of Oxford PV:

The apparent enthusiasm of Dr. Case is seen in his discussion of the perovskite cell technology. One can understand the source of Dr. Case’s enthusiasm. According to Dr. Case, “the perovskite in solar application is the fastest increasing photovoltaic efficiency of any solar photovoltaic thin film material ever! In just a few years, it went from a lab efficiency of about 6% to well over 17%…the material is a very good solar absorber….bringing the material to 25% efficiency in a monolithic layer and 30%+ in a perovskite tandem layer….potentially the future replacement for silicon.” This perovskite solar cell technology is optimized to drive a paradigm shift in the aesthetics, performance, and cost of BIPV (Building Integrated Photovoltaic) systems, potentially bringing low cost electricity to the solar market much sooner than predicted. It is no wonder the highly respected international journal, Nature, has named Dr. Henry Snaith of University of Oxford as one of the ten people who have made the most difference in science during 2013 in recognition of his work on this next generation solar power technology. Let’s also take a look at the comparison between Convetional PV vs. Oxford PV, below (provided by


Conventional PV                                                                         Oxford PV_________________

Opaque                                                                                      Range of transparency options

Blue or Black                                                                              Palette of colors and tints

Contains scarce elements and rare earths                                  Sustainable, abundant, organic ingredients

Complex, high temperature and high vacuum manufacturing    Simple screen printing manufacturing processes

High capital cost of manufacturing                                            Low capital cost of manufacturing

Heavy panels physically attached to building                          Aesthetically attractive glazing panels integrated into the building envelope


Without using the titanium dioxide as a semiconductor, this technology results in higher levels of efficiency, much lower processing temperature, and improved cell stability. Oxford PV plans on continuing to optimize this technology’s cell efficiency and accelerate the transfer of the technology into production. Furthermore, it aims to develop the range of substrates to which the cells can be applied.

Oxford PV has a strong supporting team (such as Kevin ArthurDr. David Fyfe, Paul Vickery, etc.) With its promising future, we, the solar enthusiasts and investors alike, should keep our eyes on Oxford PV in the coming years.

~have a bright and sunny day~

Gathered, written, and posted by sunisthefuture-Susan Sun Nunamaker

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29 April

Incentive For Solar (7)-Building Integrated PV


If you are in favor of renewable/CLEAN energy, please sign the petition page showing support for FIT/CLEAN Program at Thank you.

My friends and readers, Dow Solar Shingles were not just discovered yesterday.  In the 1970’s PV (photovoltaics) applications for buildings began appearing, with aluminum-framed PV modules connected to, or mounted on buildings that were usually in remote areas without access to an electric power grid.  In the 1980’s PV module add-ons to roofs surfaced. These PV systems were usually installed on utility-grid-connected buildings in areas with centralized power stations.  In the 1990’s building-integrated photovoltaics (BIPV), construction products designed to be integrated into a building envelope (physical separator between the interior and exterior environments of a building) such as the roof, skylights, or facades, became commercially available. These materials are increasingly being incorporated into the construction of new buildings as a principal or ancillary source of electrical power, although existing buildings may be retrofitted with BIPV modules as well.  According to Business Wire of April 5, 2011,  “the global BIPV market will see strong growth in the coming years, with annual wholesale revenues rising from $744 million in 2010 to nearly $4 billion in 2016….”

Building-Integrated Photovoltaic modules are available in different forms: Flat roofs (a thin film solar cell integrated to a flexible polymer roofing membrane is the most widely installed flat roofs to date);Pitched roofs ( solar shingles are modules designed to look and act like regular shingles, while incorporating a flexible thin film cell and extending normal roof life by protecting insulation and membranes from ultraviolet rays and water degradation…this is accomplished through elimination of condensation because the dew point is kept above the roofing membrane.);Facades (modules are mounted on the facade of the building, over the existing structure, providing old building a new look and increase the appeal of the building and its resale value);Glazing (semitransparent modules can be used to replace elements made with glass or similar materials, such as windows and skylights.).

In some countries, additional incentives are offered for building-integrated photovoltaics in addition to the existing feed-in tariffs for stand-alone solar systems. (I promise I will go into details in explaining “feed-in-tariffs” in future posts).  Since July 2006 France offered the highest incentive for BIPV, equal to an extra premium of EUR 0.25/kWh paid in addition to the 30 Euro cents for PV systems. These incentives are offered in the form of a rate paid for electricity fed to the grid.

please take a look at the next clip….>




European Union

Please refer to:,

  • France + EUR 0.25/kWh
  • Germany – former EUR 0,05/kWh facade bonus expired in 2009
  • Italy + EUR 0.04-0.09 kWh
  • Spain, compared with a non- building installation that receives 28,00 cent€/kWh (RD 1578/2008):
    • <= 20 KW, 34,00 cent€/kWh
    • >20 kW: 31,00cent€/kWh


Please refer to:  April 15 , April 18, April 24, of 2011 posts

  • USA – Varies by state. Check Database of State Incentives for Renewables & Efficiency for more details.


Please refer to: , ,

Further to the announcement of a subsidy program for BIPV projects in March 2009 offering RMB20/watt for BIPV systems and RMB15/watt for rooftop systems, the Chinese government recently unveiled a photovoltaic energy subsidy program “the Golden Sun Demonstration Project”. The subsidy program aims at supporting the development of photovoltaic electricity generation ventures and the commercialization of PV technology. The Ministry of Finance, the Ministry of Science and Technology and the National Energy Bureau have jointly announced the details of the program in July 2009. Qualified on-grid photovoltaic electricity generation projects including rooftop, BIPV, and ground mounted systems are entitled to receive a subsidy equal to 50% of the total investment of each project, including associated transmission infrastructure. Qualified off-grid independent projects in remote areas will be eligible for subsidies of up to 70% of the total investment. In mid November, China’s finance ministry has selected 294 projects projects totaling 642 megawatts that come to roughly RMB 20 billion ($3 billion) in costs for its subsidy plan to dramatically boost the country’s solar energy production.

What can I say….we need MORE  INCENTIVES  FOR  SOLAR in US if we are truly aiming for SunShot Initiative and truly aiming to lead in the renewable energy era !!

More discussions remain in future posts on incentive for solar….

Posted by sunisthefuture-Susan Sun Nunamaker,
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