The primary objective of this NATO Advanced Study Institute (ASI) was to present an up-to-date overview of various current areas of interest in the field of photovoltaic and related photoactive materials. This is a wide-ranging subject area, of significant commercial and environmental interest, and involves major contributions from the disciplines of physics, chemistry, materials, electrical and instrumentation engineering, commercial realisation etc. Therefore, we sought to adopt an inter disciplinary approach, bringing together recognised experts in the various fields while retaining a level of treatment accessible to those active in specific individual areas of research and development. The lecture programme commenced with overviews of the present relevance and historical development of the subject area, plus an introduction to various underlying physical principles of importance to the materials and devices to be addressed in later lectures. Building upon this, the ASI then progressed to more detailed aspects of the subject area. We were also fortunately able to obtain a contribution from Thierry Langlois d'Estaintot of the European Commission Directorate, describing present and future EC support for activities in this field. In addition, poster sessions were held throughout the meeting, to allow participants to present and discuss their current activities. These were supported by what proved to be very effective feedback sessions (special thanks to Martin Stutzmann), prior to which groups of participants enthusiastically met (often in the bar) to identify and agree topics of common interest.

Preface. Invited Papers. Large-Area Smart Glass and Integrated Photovoltaics; C.M. Lampert. Photovoltaic Materials, an Overview of Historical Development, Current State of the Art and Future Scope; D. Dimova-Malinovska. Electronic Characterisation and Modelling of Disordered Semiconductors; J.M. Marshall. Measurement Methods for Photoactive Materials and Solar Cells; G.S. Popkirov. Structural and Optical Properties of Microcrystalline Silicon for Solar Cell Applications; R. Carius. Crystalline Silicon p-n Junction Solar Cells - Efficiency Limits and Low-Cost Fabrication Technology; J. Szlufcik. Application of III-V Compounds in Solar Cells; V.M. Andreev. Micro-/Poly-Crystalline Silicon Materials for Thin Film Photovoltaic Devices: Deposition Processes and Growth Mechanisms; J.K. Rath. Micro-/Poly-Crystalline Silicon Materials for Thin Film Photovoltaic Devices: Physical Properties; J.K. Rath. Micro-/Poly-Crystalline Silicon Materials for Thin Film Photovoltaic Devices: Application in Solar Cells; J.K. Rath. Organic Materials and Devices for Photovoltaic Applications; J.-M. Nunzi. Photovoltaic Applications; M. Palfy. Past, Actual and Future EU-Funded Research, Technological Development and Demonstration Actions in the Field of Photovoltaics; T.L. D''Estaintot. Contributed Papers. Evaluation of the Gap State Distribution in a-Si:H by SCLC Measurements; A. Eray, G. Nobile. Creation and Annealing of Light Induced Metastable Defects in a-Si1-xCx:H; A.O. Dodolbas, Ö. Öktü. Potential PV Materials Based on InN Polycrystalline Films: Growth, Structural and Optical Properties; V.Ya. Malakhov. Light Soaking Effect in a-Si:H Based n-i-p and p-i-n Solar Cells; G. Nobile, M. Morana. Accelerated Ageing Test of Solar Cells and Encapsulations; V. Å aly, et al. Differential Spectral Responsivity of µc-Si:H Solar Cells; M. Sendova-Vassileva, et al. Temperature and Compositional Dependence of Raman Scattering and Photoluminescence Emission in CuxGaySe2 Thin Films; C. Xue, et al. Enhancement of the Photovoltaic Efficiency of Ge0.2Si0.8/Si Photodiodes; M.M. Pociask, et al. Charge Carrier Transport and Photovoltage in Layers Based on Poly(3,3Phthalidylidene-4,4 Biphenylilene); A.R. Tameev, et al. Diagnostics of Large-Area Solar Cell Homogeneity by Local Irradiation; V. Benda. Determination of Trap Parameters from Photocurrent Decay Measurements: Metal-Free Phthalocyanine Films; I. Zhivkov, et al. Luminescent Properties of Li2£/YY£4O7 (LTB) Polycrystals at the Deviation from Stoichiometry; B.M. Hunda, et al. Influence of Solution Resistivity and Postanodizing Treatment of PS Films on the Electrical and Optical Properties of Metal/Ps/Si Photodiodes; K. Ait-Hamouda, et al. Study of Sol-Gel Derived Very Thin Films of Mixed Titanium Dioxide and Vanadium Oxide; T. Ivanova, et al. Photoelectrochemical Characterization of Some Argyrodite-Type Materials; Yu. Stasyuk, et al. Optical Absorption in APCVD Metal Oxide Thin Films; K.A. Gesheva, et al. Extrinsic Surface Photovoltage Spectroscopy &endash; An Alternative Approach to Deep Level Characterisation in Semiconductors; K. Germanova, et al. CELLO: An Advanced LBIC Measurement Technique for Solar Cell Local Characterisation; J. Carstensen, et al. The Behaviour of PV Module Parameters as a Function of Solar Cell Temperature in Hot Climates; P. Vitanov, et al. Application of SiO2: Re Layers for Improvement of the UV Sensitivity of a-Si:H Solar Cells; M. Sendova-Vassileva, et al. Cost-Effective Porous Silicon Technology for Solar Cell Industrial Applications; V. Yerokhov, et al. Influence of Vacuum Annealing on the Composition of CuInSe2; M. Kauk, et al. Photograph. Participants. Index.