The smarter E Podcast

Recorded at the Tandem PV Workshop in Berlin, this week’s episode explores one of the most exciting frontiers in solar technology: perovskite-based tandem photovoltaics. Featuring two leading researchers from Helmholtz Zentrum Berlin (HZB), the conversations dive into why perovskites could unlock the next major step forward in solar efficiency – and what still needs to happen before the technology reaches mass commercialization. In the first interview, we’re joined by Professor Rutger Schlatmann, Head of the Solar Energy Division at Helmholtz Zentrum Berlin, to unpack why silicon-perovskite tandem solar cells are attracting so much attention from researchers and industry. Rutger explains how conventional silicon technology is approaching its physical efficiency limits, and why adding a perovskite layer on top of silicon offers a pathway to significantly higher performance. In the second half of the episode, we speak with Angelika Harter, Group Lead Industrial-like Silicon Perovskite Tandem Baseline at HZB, about the transition from record-breaking laboratory results toward commercially viable solar products. Angelika shares insights from the Tandem PV Workshop, where the industry’s focus is shifting from simply achieving higher efficiencies toward improving stability, scalability, and reproducibility. We also explore new opportunities for perovskite technologies beyond conventional solar modules – including flexible PV, indoor applications, and space technologies – and why the next five years could prove critical for bringing the first generation of commercial perovskite products to market. ✉️ Questions or feedback? Write us at podcast@thesmartere.com

UNSW has played an outsized role in the development of crystalline-silicon solar technology and the modern solar industry. Through its leadership of the Australian Centre for Advanced Photovoltaics (ACAP), it continues to help shape the future of solar innovation. ACAP brings together leading Australian solar research programs, works across the entire solar value chain, and collaborates closely with major global manufacturers – including industry giants in China. In this episode, UNSW researcher and ACAP Executive Director Professor Renate Egan joins host Jonathan Gifford to share the latest developments in solar research and discuss how technology will continue driving the PV industry in 2026. Follow The smarter E podcast for more global insights into the clean energy transition – and don’t forget to rate and review if you enjoy the show!

Today, we dive into one of the most exciting areas of the energy transition: the expansion and optimisation of our power grids and the role that startups play in this. There's no question that the big players in the energy industry are important. But more and more often, it's the young, courageous companies that are driving change in the system with fresh ideas, new technologies, and unusual business models. However they need tackle quite a few hurdles on their way. How do start-ups manage to assert themselves in a highly regulated and technically demanding industry? How do they work with grid operators, municipal utilities, or energy suppliers, and where do they encounter resistance? We talk about this with Johan Söderbom, Thematic Leader for Smart Grids and Energy Storage at EIT InnoEnergy. About Johan Söderbom Between 1995 and 2014, Johan worked at the northern European Utility Vattenfall AB in various positions in R&D. From 2014 to 2019, Johan was heading a section at RISE (Research Institutes of Sweden) responsible for electrical and optical measurement technology, and he now holds the position of thematic leader for Smart Grids and Energy Storage at EIT InnoEnergy. About INNOENERGY InnoEnergy is industrialising clean tech innovation to enable and grow a global net-zero economy. Active in Europe and the US, the company invests in early-stage start-ups and in the current and future workforce, building resilient clean-tech value chains that drive sustainable economic growth. Through its ecosystem – with 1,400 partners including 39 shareholders spanning industry, finance, public policy, and academia – the company scales the energy transition at speed. Since 2010, InnoEnergy has supported 540+ companies, helping 4 of them grow into industrial unicorns. These companies have raised more than €34 billion to date, created over 47,000 jobs, and are on track to generate €110 billion in revenue and reduce 2.3 gigatons of CO2e by 2030. Currently, InnoEnergy is invested in 160+ start-ups and scale-ups. In support of the EU’s climate and industrial goals, InnoEnergy leads industrial alliances in batteries and solar, and accelerates the uptake of green hydrogen. Pinpointing market gaps, InnoEnergy launches new industrial champions in sectors including batteries, steel, and fertilisers. InnoEnergy was established in 2010 by the European Institute of Innovation and Technology (EIT), a body of the European Union, as one of its first Knowledge and Innovation Communities (KIC). In 2025, the EIT and InnoEnergy entered into a new partnership, continuing their collaboration on specific projects.

Today, we're examining a region that's rarely in the spotlight in the international energy debate, yet has enormous potential: Central Asia. Specifically five countries characterised by a long tradition of fossil fuels, but also by an abundance of sun, wind, and water: Kazakhstan, Uzbekistan, Kyrgyzstan, Tajikistan, and Turkmenistan. Are these countries already tapping into their potential for a sustainable energy future? We’ll get up to speed in regards to their political strategies and investment programs driving the transformation. What are the biggest hurdles in terms of regulation, financing, and infrastructure? How important are international partnerships in making this region a key player in the global energy transition? We talk about this with Elena Metzger. About Elena Metzger Elena Metzger leads the German Energy Dialogues with Kazakhstan and Uzbekistan on behalf of the Federal Ministry for Economic Affairs and Energy (BMWE). She has been the driving force to shape the Energy Dialogues into a key platform for political and technical exchange on energy efficiency, industrial decarbonization, renewable energies, and green hydrogen. She is also team leader for Central Asia, Türkiye, and the South Caucasus in the International Cooperation Department at the German Energy Agency (dena). About the bilateral Energy Partnership Central Asia With regard to cooperating in the field of energy policy, achieving international climate goals and making climate neutrality a reality by 2045, the German Government’s bilateral Energy Partnerships (EPs) have become one of its most important international energy and climate policy instruments. The growing network strengthens political dialogue on climate protection and energy system transformation between Germany and partner countries worldwide. The declared aim of this cooperation is to shape a successful global energy transition that combines security of supply, decarbonisation of industry and foreign trade promotion with effective climate protection. Today's episode is supported by Weidmüller, a specialist in electrification, automation, digitalisation, electrical connectivity and renewable energies. The family-owned company celebrates its 175th anniversary this year and is a true solar pioneer, boasting over 20 years of experience in PV. With more than 80 locations worldwide, Weidmüller markets combiner boxes, communication infrastructure and installation accessories for utility-scale and rooftop systems.

The European energy system is undergoing profound change, driven by the urgent need to combat climate change and secure a sustainable energy future. Underneath initiatives such as the European Green Deal this transition, opens up enormous opportunities but also brings with it considerable complexities. One Key to Smart grids is central to effectively managing this change, and smart grids - modernised electricity infrastructures that integrate digital technologies. So what is the transformative potential of artificial intelligence (AI) and generative AI (GenAI) in the context of European smart grids? What can AI achieve? How AI also improve collaboration with humans in this area? And where are the dangers? We talk about this with Luís Vale Cunha. About Luís Vale Cunha He chairs the European Technology & Innovation Platforms (ETIPs) for Smart Networks for Energy Transition (SNET). Additionally, he is the Head of DSO Portugal and heads European Affairs. He is also a Member of the Board representing DSOs at the European level. In addition, he is the author of the interesting book "The Neo-Synthesis Age: Redefining Human Potential Through AI Collaboration".

In this episode, we take a look at a topic that combines agriculture and the energy transition: agri-photovoltaics in India. India is considered one of the largest agricultural markets in the world and at the same time a hotspot for solar energy. But how can these two worlds be successfully combined in practice? Which technologies are gaining ground? And which political conditions are accelerating or slowing down the market ramp-up? We discussed this with Tobias Winter, who heads the Indo-German Energy Forum Support Office in India. About Tobias Winter Mr. Tobias Winter was born in East Berlin, Germany and holds a degree in Business Administration of the Rhine-Westphalia Institute of Technology Aachen (RWTH Aachen University). During his career, Mr. Winter has gained professional experience in renewable energy and energy efficiency projects and the corresponding legislation in Germany, India, Argentina, Uruguay and Paraguay. He first came to India in 2005 to develop a solar water desalination project with TERI Bangalore. He then worked in Argentina implementing solar energy solutions in the highland region Puna. From 2009 to 2014, he was the Director of the Competence Center in Renewable Energies for the German Chambers Network in Argentina, Paraguay and Uruguay. In 2015, he came back to India, since then leading the Support Office of the Indo-German Energy Forum, to promote cooperation in energy security, energy efficiency, renewable energies, investments in energy projects and collaborative research and development with participation from India and Germany. The Indo-German Energy Forum Support Office has been tasked by Prime Minister Modi and Chancellor Scholz to implement the Indo-German Green Hydrogen Task Force. The Indo-German Energy Forum is part of the Bilateral Energy Partnerships – the central instrument of the energy policy of the Federal Ministry for Economic Affairs and Energy. With now more than 30 partner countries, they form a global, steadily growing and valuable network between Germany and strategic partner countries that want to transform their energy systems for a sustainable, economically attractive and secure energy transition. The declared aim of the Bilateral Energy Partnerships is to shape a successful global energy transition that combines security of supply, decarbonization of industry and foreign trade promotion with effective climate protection.

Wie könnte Deutschland die PV-Industrie wieder zurückholen? Daran forscht das ISC Konstanz seit Jahren und sieht gute Chancen. Im Gespräch mit Dr. Kristian Peter erläutert dieser, wo die Chancen, Notwendigkeiten und Schwierigkeiten liegen. Über Dr. Kristian Peter Dr. Kristian Peter ist seit 2005 Vorsitzender des Vorstandes des ISC Konstanz e.V., seit 2007 Mitglied der Geschäftsführung und wiss. Mitarbeiter der ISC Konstanz e.V. und hat zudem seit 2010 die Abteilungsleitung „R&D Energy Systems“ zu seinen Aufgaben. Zuvor unterstützte er bis 2010 Elkem Solar bei der Entwicklung von Solar-Silizium für die PV und war an der Universität Konstanz Gruppen- und Abteilungsleiter für den Bereich kristalline Dünnschichtsolarzellen und „Solar Grade Silicon“ am Lehrstuhl Prof. Dr. Ernst Bucher für angewandte Festkörperphysik. Über die ISC Koblenz 2005 brachten 17 Gründungsmitglieder, überwiegend Physiker der Universität Konstanz, das „International Solar Energy Research Center Konstanz“ (ISC Konstanz) als eingetragenen gemeinnützigen Verein an den Start. Heute erforscht und entwickelt das internationale Team aus über 65 Mitarbeitenden kristalline Silizium-Solarzellen, Module und Gesamtenergiesysteme. Die Solarzellen der ISC Konstanz sind hocheffizient und kostengünstig in der Produktion. Besonders im Bereich der kristallinen n-Typ Solarzellen nimmt das Unternehmen inzwischen weltweit eine Spitzenposition ein. Es arbeitet mit den international führenden Instituten und Unternehmen der Photovoltaik-Branche zusammen.