DuPont Photovoltaic Solutions

David B. Miller, Group VPDuPont Electronic &

Communication Technologies

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© 2009 E.I. du Pont de Nemours and Company. All Rights Reserved.

Regulation G

The attached charts include company information that does not conform to generally accepted accounting principles (GAAP). Management believes that an analysis of this data is meaningful to investors because it provides insight with respect to ongoing operating results of the company and allows investors to better evaluate the financial results of the company. These measures should not be viewed as an alternative to GAAP measures of performance. Furthermore, these measures may not be consistent with similar measures provided by other companies.

This data should be read in conjunction with previously published company reports on forms 10-K, 10-Q, and 8-K. These reports, along with reconciliations on non-GAAP measures to GAAP are available on the Investor Center of www.dupont.com.

During the course of this presentation we may make forward-looking statements or provide forward-looking information. All statements that address expectations or projections about the future are forward-looking statements. Some of these statements include words such as "expects," "anticipates,” "plans," "intends," "projects," and "indicates.” Although they reflect our current expectations, these statements are not guarantees of future performance, but involve a number of risks, uncertainties, and assumptions. Some of those risk factors include economic conditions, competitive pressures, challenges associated with research and development, market acceptance of new products, and regulatory approval. We urge you to review DuPont's SEC filings, particularly its latest annual report on Form 10-K and quarterly report on Form 10-Q, for a discussion of some of the factors which could cause actual results to differ materially. The Company does not undertake to update any forward-looking statements as a result of future developments or new information.

Forward Looking Statements

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© 2009 E.I. du Pont de Nemours and Company. All Rights Reserved.

DuPont…A Market Driven Science Company… What you should expect

Robust product pipelines

End-user relevance

Protected inventions

Sustainable solutions

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© 2009 E.I. du Pont de Nemours and Company. All Rights Reserved.

Growth StrategiesProtect & grow base business in materialsExpand emerging technologies; thin filmLeverage “One DuPont” to create newopportunities down value chain

AccomplishmentsSignificant product launches:

Solamet® PV159 metallization pasteTedlar® SP Series film

Tedlar®/Toppan licensing agreement 12 expansions: R&D & manufacturing Established market facing enterprise3X Increase: DPVS Sales & R&D resourcesSupplying 18 of top 20 manufacturers

DuPont Photovoltaic Solutions (DPVS)

$0

$250

$500

2006 - 2008 Sales

20082006

($ M

illio

ns)

DPVS growing faster than the PV market

69% CAGR

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© 2009 E.I. du Pont de Nemours and Company. All Rights Reserved.

Asia31%

2006 Regional Sales Distribution

Europe57%

NorthAmerica

12%

DuPont Photovoltaic Solutions Regional growth shifting to Asia

Asia43%

2008 Regional Sales Distribution

Europe47%

NorthAmerica

10%

Well established global footprint

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© 2009 E.I. du Pont de Nemours and Company. All Rights Reserved.

Photovoltaics IndustryGlobal trends driving big opportunities

Demand for Renewable EnergyLocal subsidies & feed-in-tariffsRenewable portfolio standardsDramatic cost reduction through new technologiesBroad application development opportunities

Large Market Growing Fast*~$30B today~$70B by 2013

Source: Lux Research Inc.

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© 2009 E.I. du Pont de Nemours and Company. All Rights Reserved.

Photovoltaics Industry

Silicon, Ingot &

Wafer Mfg

Cell metallization& process chemicals

Films for backsheets& frontsheets

Module encapsulation

Engineering resins & components

DPVS is an industry leader in several critical materials…

c-Si Cell Mfg

ModuleMfg

Systems Integration

& Installation

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© 2009 E.I. du Pont de Nemours and Company. All Rights Reserved.

Photovoltaics Industry

…and is aligned with the leaders in the industry

Silicon, Ingot &

Wafer Mfg

c-Si Cell Mfg

ModuleMfg

Systems Integration

& Installation

The company names listed on this page are the property of the companies identified above, and some, as indicated, are registered trademarks of those companies.

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© 2009 E.I. du Pont de Nemours and Company. All Rights Reserved.

Solar Cell TechnologyCrystalline Si (c-Si) PV cells & modules

Amorphous Si (a-Si) thin film PV modules

Elvax® EVA

Teflon® ETFESolamet®MetallizationPastes

Tedlar® PV 2001

Rynite® PET resin Mylar® PET film

Rynite® PET resin

Tedlar® PV 2001

Teflon® ETFE

DuPont™ PV5200 encapsulation sheet

Fastest growth in thin film

Vertical integration by top module producers

Rapid growth of commercialand utility segments

Strong need for improvedmodule reliability

DuPont focus on partnerships,enabling technologies, andend market requirements

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© 2009 E.I. du Pont de Nemours and Company. All Rights Reserved.

DuPont Offering

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© 2009 E.I. du Pont de Nemours and Company. All Rights Reserved.

Well Positioned For Growth

New investments consistent with growth strategy

Expanded encapsulationlab capabilities

(Belgium)

Expanded technical center (Taoyuan, Taiwan)

Doubled capacity of Solamet®metallization pastes(Dongguan, China)

Doubled capacity of Solamet®metallization pastes

(Bristol, UK)

New R&D lab & Technical center (2010)

(Hyderabad, India)

Invested $50M on Tedlar®

polymer capacity expansion (Fayetteville, NC)

R&D Facilities

Manufacturing

New R&D thin film lab(Hong Kong)

Building thin film production facility (Shenzhen, China)

Expanded R&D lab (Kanagawa, Japan)

Expanded technical center(Shanghai, China)

Expanded encapsulationtesting capabilities(Wilmington, DE)

Announced intent to more than double global production for

Tedlar® (2010 start-up)

New PV R&D Center (Geneva, Switzerland)

New PV R&D Center (2010)(Wilmington, DE)

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© 2009 E.I. du Pont de Nemours and Company. All Rights Reserved.

2009 DuPont Photovoltaics PipelineIndustry Leading Technology

Peak Sales: 321 < $25M > $100M$25M - $100M

ValueAdv. Dev.Early Dev.

Proof of Concept Pre-Launch

321 4DiscoveryProject

Higher Temperature Substrates

Integrated Films for Thin Film Modules

Tedlar Gen III Backsheet

Higher Efficiency Metallization Pastes

Simplified Module Installation

DuPont Apollo

PV 5300 Next Generation Encapsulant

3

2

3

2

2

1

Thin

Film

Materials for Concentrator Systems

c-Si

Advancing key pipeline initiatives connected to strategic customers

2

Integrated Films for cSi Modules

2

Printable Photoactive Semiconductors2

2

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© 2009 E.I. du Pont de Nemours and Company. All Rights Reserved.

DuPont Photovoltaic Solutions Strong Brand Positioning

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© 2009 E.I. du Pont de Nemours and Company. All Rights Reserved.

DPVS Top Line Growth Drivers (2008–2012)

$400

$1,000

$0

$500

$1,000

Sales 2008 Base Growth* New Products* BusinessExtensions*

Sales 2012E

$ M

illio

n

Multiple growth opportunities

* Company Estimates

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© 2009 E.I. du Pont de Nemours and Company. All Rights Reserved.

Growing Solar Installations

DuPont Sustainability Goals In ActionPioneer Hi-Bred Waimea Research Center 1,500 panels; 1 acre arrayOffsets 55% of facility’s electrical usage5 yr payback with high teens project returns

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© 2009 E.I. du Pont de Nemours and Company. All Rights Reserved.

Summary

DuPont Photovoltaic Solutions is on a growth trajectory to exceed $1B by 2012

We are investing to meet growth requirements and product renewal in base businesses

We are creating new opportunities through innovation in emerging thin film technologies