An industries perspective of photovoltaic research needs is presented. Objectives and features of industry needs are discussed for the materials, devices, processes, and reliability research categories

Ravi, K. V.

English

NASA Technical Reports Server

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PHOTOVOLTAIC RESEARCH NEEDS: INDUST A Y PERSPECTIVE 
MOBIL TYCO SOLAR ENERGY CORP. 
(Presented by J.P. Kalejs) 
K.V. Ravi J 
Research Objectives of PV Industry 
e TO UNDERSTAND, DEVELOP AND INPLENENT NEW 
PROCESSES FOR THE PURPOSES OF MHUFACTURING 
COST REDUCTION AND REVENUE ENHANMlENT, 
0 TO DEVELOP DETAILED UNDERSTANDING O f  ONGOING 
PROCESSES TO MINTAIN INTE5RITY OF THE PROCESS 
AND TO ENHANCE YIELDS AND EFFICIENCIES. 
e TO MINTAIN AWARENESS OF NEW DEVELOPMENTS AND 
CAPITALIZE ON THESE TO SUSTAIN AND ENHANCE 
HARKET SHARE AND PROFITABILITY. 
https://ntrs.nasa.gov/search.jsp?R=19830002246 2020-03-21T06:55:24+00:00Z
PLENARY SESSION: K.V. RAW 
Features of R&D Geared Toward Industry Needs 
0 RELATIVELY SHORT W E  (1-5 YEARS). 
0 INTERACTIVE - INDUSTRY, GOVERMENT, UNfVCRSfTIES. 
a RESEARCH IS IORE DNELOPRMTAL IN  NATURE AND LESS 
FUNMENTAL. 
a RESEARCH NEEDS TO BE GMERAL I N  NATURE RATHER THAN 
PWWCT OR PROCESS SPECIFIC - PROBLEB PERTAINING TO 
PROPRIETARY TECHNOLOGY. 
0 DIFFICULTY OF TECHNOLOGY TRANSFER (MAFIPLE OF SUCCESSFUL 
TECHRLOGY TRANSFER IS THE EVA ENCAPSULATIOW TECHNOLOGY 
DEVELOPED UNDER DOVJPL SFYINSORSHIP) . 
Research CateGaries 
MATERIALS 
DEVICES 
PROCESSES 
RELIABILITY 
156 
PLENARY SESSION: K.V. RAVl 
Materials Research 
MTERIALS PRODUCTION 
e RATE EFFECTS I N  CRYSTAL GROUTH, 
e HENISCUS AM) INTERFACE PHEMNENA, 
e STRESS PROBLENS I N  HIGH RATE, LARGE AREA SHEET 
GROKM , 
e IHPURITY INCORPORATION AND DISTRIBUTION EFFECTS 
AND I lEMANISS.  
RATERIALS PROPERTIES 
0 ELECTRONIC PROPERTIES OF IMPERFECT AND IMPURE 
CRYSTALS. 
0 PROBLMS PERTAINING TO INHWGENEOUS CRYSTALS. 
0 THE INFLUENCE OF CARBON AND OXYGEN IN sILIcori ON 
ELECTRON I C  PROPERTIES . 
e I’.’LUENCE OF T H E R M  PROCESSES ON ELECTRONIC AND 
t iCh’;l:’ICAL PROPERTIES, 
e ELELTR!INIC EFFECTS OF GRAIN BOUNDARIES, DISLOCA- 
TIONS, IMPURITY IIO1OHOGENEITIES, 
MATERIALS ANALYSIS 
0 CENTRALIZED ANALYTICAL AND CHARACTERIZATION 
SERVICES INCLUDING CHEMICAL, PHYSICAL AND 
ELECTRICAL CHARACTERIZATION. 
e NON-DESTRUCTIVE TECHNIQUES FOR RAPID RATERIALS 
PROPERTY ANALYSIS INCLUDING LIFETIME MEASURE- 
MENTS, CRACK DETECTION IEC SOLAR CELLS, ETC, 
0 CHARACTERIZATION OF MATERIALS PRONE TO HIGH 
IMPURITY AND DEFECT CONCENTRATIOR, 
157 
PLENARY SESSION: K.V. RAVl 
Device Research 
0 ANALYSIS AND D€VELOf?HT OF DEVICE STRUCTURE 
FOR MIWIZIffi CONVERSION EFFICIENCIES. 
0 R 8 D ON CONDUCTING OXIDES, HETEROJUHCTIOWS, 
JUNCTION PROFILES, GRADED JUKTIM, VOLTAGE 
ENHANCEmNT TECHN I WES a 
0 DEVICE CONFIGURATIONS SUITED TO HATERIAL PRONE 
TO CONTAIN A H i G H  DENSITY OF IRERFECTIONS AND 
IWURITIES, 
c 
I 
158 
__L_) '  
PLENARY SESSION: K.V. RAW 
Process Research 
PROCESS TECHNOLOGY 
0 RAPID PROCESSING TECHNOLOGY 
- HIGH SPEED JUNCTION FORMTION AND METALLIZA- 
TION TECHNOLOGIES AND HEMODS FOR DEPOSITION 
OF MULTIPLE AR COATINGS, METAL CONTACTS, 
0 BE4M PROCESSING 
- LASERS, E-BEAMS, MICROWAVES FOR DIFFUSION, 
IETAUIZATION, S INTERING, JUNCTION ISOLATION 
0 HATERIALS U(CI&ERING TO DEVELOP TECHNIQUES SUCH 
AS INTRINSIC GEllE?!NC.. SELECTIVE HEATING OF 
CRYSTALS FOR SL?FO[FII\NCE ENHANCEMENT, 
0 DEVELOPMENT OF BASE METAL PASTES FOR SCREEN 
PRINTED CONTACTS, 
NIQUES. 
LASER ASSISTED PLATING TECH- 
- AUTOHATION AND MATERIALS HANDLiNG 
0 PROCESS DEVELOPMENTS GEARED TOWARDS THE NEEDS OF 
AUTOMATION AND LARGE SCALE MANUFACTURE, 
0 YIELD EtHANCEflENT TECHNIQUES, 
0 TECHNOLOGY TO DETECT BROKE14 CELLS I N  PROCESS. 
159 
0 FUNDAMENTAL UNDERSTANDING OF FRACTURE MECHANICS 
OF SILICON, RESIDUAL STRESS WELTS,  THICKNESS 
EFFECTS AND EDGE QUALITY EFFECTS. 
PLENARY SESSION: K.V. RAVl 
Reliability 
0 FIELD TESTIffi OF NODULES, 
0 ESTABLISHMENT OF STANDARDS. CALIBRATION OF 
STANDARD CELLS, 
0 ACCELERATED CELL AND P A N U  TESTING, WEAR OUT 
AND FAILURE MECHANISMS, 
RELIABILITY PHYSICS - R 8 D I N  THE PHYSICS OF 
RELIABILITY OF AATERIALS, DEVICES, METAUIZATIOff 
SYSTERS, INTERCONNECTS, PACKAGES. 
i 160 


Photovoltaic research needs industry perspective

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